Ready to challenge your chemistry chops? Our free first 36 elements quiz tests your knowledge of the first 36 elements on the periodic table, elemental symbols, atomic numbers and the correct symbol for fluorine - essentials for mastering the first 36 elements of the periodic table and recognizing each atom from hydrogen to krypton. Sharpen your recall of periodic table first 36 elements and gain speed, confidence and handy tips for memorizing tricky items. If you crave more, jump into the first 40 elements challenge or try our extended periodic table test . Get started now, see your score and share your success!
What is the chemical symbol for the element with atomic number 1?
Li
H
O
He
Hydrogen is the first element in the periodic table and has atomic number 1, which is represented by the symbol H. It is the lightest element and the most abundant in the universe. The periodic table places it at the top of Group 1 due to its single proton. Learn more.
Which element is represented by the symbol He?
Hydrogen
Helium
Lithium
Neon
The symbol He stands for Helium, which is the second element with atomic number 2. It is a noble gas known for its low reactivity and light weight. Helium is commonly used in balloons and as a coolant in cryogenics. Learn more.
Which element has the atomic number 3?
Sodium
Boron
Lithium
Beryllium
Lithium is the third element on the periodic table and carries atomic number 3. It is a soft, silvery alkali metal most notable for its use in rechargeable batteries. Lithium's position reflects its single valence electron and Group 1 classification. Learn more.
Which element has the symbol B?
Beryllium
Barium
Bismuth
Boron
The symbol B represents Boron, which has atomic number 5. Boron is a metalloid used in borosilicate glass and detergents. Its electron configuration [He]2s2 2p1 gives it properties between metals and nonmetals. Learn more.
What is the atomic number of Carbon?
5
8
6
7
Carbon is the sixth element in the periodic table, giving it the atomic number 6. It is tetravalent, forming a wide variety of organic compounds. Carbon's ability to form strong covalent bonds makes it essential for life. Learn more.
Which element is represented by the symbol C?
Chlorine
Copper
Calcium
Carbon
The symbol C stands for Carbon, which is element number 6. Carbon's versatility in forming chains and rings is the foundation of organic chemistry. It exists in multiple allotropes, including diamond and graphite. Learn more.
What is the atomic number of Oxygen?
6
8
9
7
Oxygen has atomic number 8 and is a critical component of Earth's atmosphere. It is a diatomic gas at room temperature and supports respiration in most life forms. Oxygen's high electronegativity makes it a strong oxidizing agent. Learn more.
Which element has the symbol Ne?
Nitrogen
Neodymium
Selenium
Neon
Neon, with the symbol Ne and atomic number 10, is a noble gas known for its reddish-orange glow in discharge tubes. It is chemically inert and used in neon signs. Neon's complete valence shell makes it stable and unreactive. Learn more.
Which element has atomic number 11?
Sodium
Magnesium
Aluminum
Potassium
Sodium is element number 11 and is a soft, reactive alkali metal. It readily forms Na+ ions and is essential for nerve function in biology. Sodium's flame color test yields a bright yellow emission. Learn more.
What is the chemical symbol for magnesium?
Mg²?
Mn
Mo
Mg
Mg is the symbol for magnesium, which has atomic number 12. It is an alkaline earth metal and forms a bright white flame when burned. Magnesium's low density makes it useful in lightweight alloys. Learn more.
Which element has atomic number 13?
Silicon
Phosphorus
Aluminum
Sulfur
Aluminum carries atomic number 13 and is a lightweight metal used in everything from cans to aircraft. It forms a protective oxide layer that prevents further corrosion. Aluminum is the most abundant metal in Earth's crust. Learn more.
What is the chemical symbol for silicon?
Sl
Sm
S
Si
Si is the symbol for silicon, a metalloid with atomic number 14. Silicon is the backbone of semiconductor technology and forms strong covalent networks in its crystalline form. It is the second most abundant element in Earth's crust. Learn more.
Which of these elements is a halogen in the first 36 elements?
Argon
Chlorine
Calcium
Neon
Chlorine, with atomic number 17, is a halogen in Group 17 of the periodic table. Halogens are highly reactive nonmetals that often form salts with metals. Chlorine is commonly used in water disinfection. Learn more.
Which element has the highest first ionization energy among Li, K, F, and O?
Potassium
Lithium
Fluorine
Oxygen
Fluorine has the highest first ionization energy among those elements due to its high effective nuclear charge and small atomic radius. Removing an electron is more difficult for fluorine than for oxygen, lithium, or potassium. Learn more.
Which noble gas has atomic number 18?
Krypton
Neon
Argon
Helium
Argon is the noble gas with atomic number 18 in Group 18. It is colorless, odorless, and makes up about 0.93% of Earth's atmosphere. Argon is used in incandescent light bulbs to prevent filament oxidation. Learn more.
Which element has the electron configuration [Ne]3s2?
Magnesium
Aluminum
Sodium
Silicon
Magnesium has the ground-state electron configuration [Ne]3s2. This reflects two valence electrons in the 3s subshell and a filled neon core. It forms divalent cations in ionic compounds. Learn more.
Which of these elements is classified as a metalloid?
Sulfur
Silicon
Aluminum
Phosphorus
Silicon is a metalloid, exhibiting properties between metals and nonmetals. It is brittle, lustrous, and a semiconductor, making it vital to electronics. Its atomic number is 14 and it sits along the metalloid line on the periodic table. Learn more.
Which element has an atomic mass close to 24.3 amu?
Magnesium
Neon
Aluminum
Sodium
Magnesium has an atomic mass of approximately 24.31 amu, making it one of the lightest alkaline earth metals. This atomic weight arises from a mixture of its three stable isotopes. Learn more.
Which element has the largest atomic radius among Na, K, Ca, and Ar?
Argon
Potassium
Calcium
Sodium
Potassium has the largest atomic radius among those options because atomic size increases down a group and K is below Na. Calcium and argon have smaller radii due to stronger nuclear attraction. Learn more.
Which element is the most electronegative among the first 36 elements?
Chlorine
Nitrogen
Fluorine
Oxygen
Fluorine has the highest electronegativity of all elements at 3.98 on the Pauling scale. It attracts electrons more strongly than oxygen or chlorine. This makes fluorine extremely reactive and a powerful oxidizing agent. Learn more.
Which element readily forms a +2 ion and is in Group 2?
Aluminum
Calcium
Sodium
Potassium
Calcium, an alkaline earth metal in Group 2, commonly loses two electrons to form Ca2+. This stable ion configuration mirrors the noble gas argon. Calcium's +2 oxidation state is found in compounds like calcium carbonate. Learn more.
Which element has the electron configuration [He]2s2?
Beryllium
Boron
Lithium
Neon
Beryllium has the electron configuration [He]2s2, indicating two valence electrons in the 2s subshell. This configuration explains its +2 oxidation state. Learn more.
Which period 3 element belongs to Group 2?
Magnesium
Sodium
Aluminum
Phosphorus
Magnesium is in period 3 and Group 2, making it an alkaline earth metal. It has two valence electrons in the 3s orbital and commonly forms Mg2+ ions. Learn more.
Which element among K, Cl, Ar, and Ca is a gas at standard conditions?
Argon
Chlorine
Calcium
Potassium
Chlorine is a diatomic gas at standard temperature and pressure. Argon is also a gas, but among the options only chlorine appears as a reactive gas in normal air. Potassium and calcium are solid metals under these conditions. Learn more.
Which element among Be, Mg, and Ca has the highest first ionization energy?
Calcium
Magnesium
They are all equal
Beryllium
First ionization energy decreases down a group due to increased atomic radius and electron shielding. Beryllium, being highest in Group 2 of those three, therefore has the highest first ionization energy. Learn more.
Which element has an electron affinity of approximately 3.62 eV?
Fluorine
Sulfur
Oxygen
Chlorine
Chlorine has one of the highest electron affinities at about 3.62 eV. Although fluorine is more electronegative, its small size leads to electron - electron repulsions that lower its measured affinity. Chlorine gains electrons readily to form Cl - ions. Learn more.
Which element commonly forms a +3 cation in ionic compounds?
Magnesium
Aluminum
Sodium
Silicon
Aluminum typically loses three electrons to form Al3+ due to its valence shell configuration [Ne]3s2 3p1. This stable cation resembles the noble gas neon. Learn more.
Which element is a semiconductor and has atomic number 14?
Silicon
Sulfur
Magnesium
Phosphorus
Silicon, atomic number 14, is a key semiconductor material used in electronics. Its four valence electrons form covalent bonds in a crystal lattice. Silicon's band gap enables controlled conductivity. Learn more.
Which element exhibits allotropes such as white, red, and black forms?
Phosphorus
Oxygen
Sulfur
Carbon
Phosphorus exists in several allotropes: white phosphorus, red phosphorus, and black phosphorus, each with distinct structures and properties. These forms arise from different bonding arrangements of P4 units. Learn more.
Which first-row transition metal's divalent ion imparts a pale pink color to its compounds?
Copper
Nickel
Manganese
Iron
Mn2+ ions are known for their pale pink coloration in aqueous solution and many salts. This arises from d - d transitions in the half-filled d5 configuration. Learn more.
Which element is a liquid at room temperature among the first 36 elements?
Chlorine
Iodine
Mercury
Bromine
Bromine is the only non-metal that is liquid at standard conditions between 1 and 36. It has a reddish-brown color and high vapor pressure. Chlorine and iodine are gases and solids, respectively, at room temperature. Learn more.
Which element has the highest melting point among the first 36 elements?
Iron
Carbon
Calcium
Silicon
Carbon, in its diamond form, has the highest melting (sublimation) point of any element at over 3500 °C. This is due to its strong covalent network. Diamond's rigid tetrahedral bonding explains its extreme thermal stability. Learn more.
Which element is paramagnetic because it has two unpaired p electrons?
Neon
Oxygen
Fluorine
Nitrogen
Oxygen has two unpaired electrons in its ?* antibonding orbitals, making it paramagnetic. This property can be demonstrated by its attraction to a magnetic field. Other diatomic p-block gases like nitrogen are diamagnetic. Learn more.
Which element's ground-state configuration ends with 3d5?
Manganese
Chromium
Cobalt
Iron
Manganese has the configuration [Ar]3d5 4s2 in its ground state, giving it a half-filled d subshell. This arrangement affords extra stability. Chromium is the anomaly with 3d5 4s1. Learn more.
Which element has an atomic mass of approximately 24.31 amu?
Sodium
Silicon
Magnesium
Aluminum
Magnesium's listed atomic mass is 24.305 amu, reflecting a weighted average of its three stable isotopes. This value is critical for precise stoichiometric calculations. Learn more.
Which element is the noble gas with atomic number 36?
Krypton
Xenon
Neon
Argon
Krypton has atomic number 36 and is a noble gas in Group 18. It is used in certain photographic flashes and high-performance lighting. Krypton's full valence shell makes it chemically inert. Learn more.
Which monatomic ion is isoelectronic with Argon?
K?
Cl?
Ca²?
S²?
Cl? has 18 electrons, matching the electron configuration of argon (1s²2s²2p?3s²3p?). While S²?, K?, and Ca²? also have 18 electrons, Cl? is the monatomic anion most commonly referred to in this context. Learn more.
Which element has the ground-state electron configuration [Ar]4s¹?
Scandium
Potassium
Calcium
Argon
Potassium has the configuration [Ar]4s¹, indicating a single valence electron in the 4s orbital beyond the argon core. This makes K highly reactive as it readily loses that electron. Learn more.
Which element has the highest first ionization energy among the first 36 elements?
Argon
Neon
Helium
Fluorine
Helium has the highest first ionization energy at 2372.3 kJ/mol due to its very small size and large effective nuclear charge for only two electrons. This makes removing an electron from He more difficult than any other element. Learn more.
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Study Outcomes
Recall the First 36 Elements and Their Symbols -
After engaging with the content, learners will confidently name each of the first 36 elements of the periodic table and recall their correct chemical symbols.
Match Elements to Atomic Numbers -
Participants will accurately pair each of the first 36 elements with its corresponding atomic number, reinforcing core periodic table concepts.
Identify Group and Period Placement -
Users will recognize the specific group and period for elements 1 through 36, enhancing their understanding of periodic trends.
Analyze Instant Feedback -
By reviewing quiz results, learners will detect and correct common errors in naming and symbol usage for the first 36 elements.
Apply Element Knowledge to Real-World Scenarios -
Participants will link the properties of the first 36 elements to everyday chemistry applications, fostering practical comprehension.
Track and Share Quiz Progress -
Users will monitor their scores across multiple first 36 elements quiz attempts and share results to encourage collaborative learning.
Cheat Sheet
Atomic Numbers & Symbols -
Memorize each element's atomic number alongside its chemical symbol to excel in any first 36 elements quiz. For example, F corresponds to 9 and Ne to 10, so linking these pairs speeds recall. Flashcards and the official IUPAC periodic table are reliable study tools.
Electron Configuration Patterns -
Apply the aufbau principle to derive the ground-state electron configurations for elements 1 - 36, such as O (1s2 2s2 2p4) and Ca ([Ar] 4s2). Recognizing the order of orbital filling (1s → 2s → 2p → 3s → 3p → 4s → 3d) reduces guesswork. University-level chemistry texts often provide detailed tables to practice these sequences.
Remember that atomic radius decreases left to right across a period and increases top to bottom, while electronegativity shows the opposite pattern. For instance, fluorine (F) has the highest electronegativity among the first 36 elements. Referencing values on the Pauling scale from CRC Handbook data reinforces this concept.
Group 1 & 2 Mnemonics -
Use the phrase "Hot Lions Never Kill" to memorize Group 1 (H, Li, Na, K) and "Beauty May Cause" for Group 2 (Be, Mg, Ca). These catchy lines reduce study time and boost retention during fast-paced quizzes. Writing them while reciting helps cement the sequences in memory.
s-, p-, and d-Block Organization -
Classify elements 1 - 36 into their respective blocks to predict their properties: s-block (H - He, Li - Be), p-block (B - Ne, Al - Ar), and d-block (Sc - Zn). For instance, iron (Fe, 26) sits in the 3d block with configuration [Ar]4s2 3d6, which influences its metallic behavior. Official IUPAC resources map these blocks clearly for quick visual reference.
