Chemical Elements

What is the symbol for Hydrogen?

• Hy

• Hg

• H

• He

Answer explanation

The symbol for Hydrogen is 'H'. 'Hy' is not a recognized symbol, 'Hg' stands for Mercury, and 'He' is the symbol for Helium. Therefore, the correct answer is 'H'.

Which element has the atomic number 2?

• Helium

• Hydrogen

• Oxygen

• Boron

Answer explanation

The atomic number of an element represents the number of protons in its nucleus. Helium has 2 protons, making its atomic number 2. Hydrogen has 1, Oxygen has 8, and Boron has 5, so the correct answer is Helium.

What element has the symbol Li?

• Lithium

• Lead

• Lanthanum

• Lutetium

Answer explanation

The element with the symbol Li is Lithium. The other options, Lead (Pb), Lanthanum (La), and Lutetium (Lu), have different symbols, making Lithium the correct answer.

What is the atomic number of Beryllium?

• 2

• 4

• 6

• 8

Answer explanation

Beryllium has an atomic number of 4, which means it has 4 protons in its nucleus. This is the defining characteristic of the element, distinguishing it from others in the periodic table.

Which element has the symbol B?

• Boron

• Beryllium

• Bromine

• Barium

Answer explanation

The element with the symbol B is Boron. Beryllium, Bromine, and Barium have different symbols: Be, Br, and Ba, respectively. Therefore, the correct answer is Boron.

What is the atomic number of Carbon?

• 5

• 6

• 7

• 8

Answer explanation

The atomic number of an element is the number of protons in its nucleus. Carbon has 6 protons, which gives it an atomic number of 6. Therefore, the correct answer is 6.

What element has the symbol N?

• Neon

• Nickel

• Nitrogen

• Neptunium

Answer explanation

The element with the symbol N is Nitrogen. Neon (Ne), Nickel (Ni), and Neptunium (Np) have different symbols, making Nitrogen the correct answer.

Which element has the atomic number 8?

• Oxygen

• Nitrogen

• Fluorine

• Neon

Answer explanation

The atomic number of an element represents the number of protons in its nucleus. Oxygen has 8 protons, making it the element with atomic number 8. Nitrogen, Fluorine, and Neon have atomic numbers 7, 9, and 10, respectively.

What is the symbol for Fluorine?

• Fl

• F

• Fu

• Fr

Answer explanation

The symbol for Fluorine is 'F'. 'Fl' is not correct, as it represents Flerovium, 'Fu' is not an element symbol, and 'Fr' stands for Francium. Therefore, the correct answer is 'F'.

Which element has the atomic number 10?

• Neon

• Nickel

• Niobium

• Neptunium

Answer explanation

The atomic number 10 corresponds to Neon, a noble gas. Nickel (28), Niobium (41), and Neptunium (93) have higher atomic numbers, making Neon the correct answer.