BMST - Basic Math and Science Atomic Structure and Bonding Questions and Answers 2

Question 1

What subatomic particle has a negative charge and orbits the nucleus?

Accepted Answer

Electron

Answer

Electrons carry a negative charge and are found in orbitals around the nucleus.

Question 2

How many electrons can the second energy level (n=2) hold?

Accepted Answer

8

Answer

The formula 2n² gives the maximum electrons per level. For n=2: 2(4) = 8.

Question 3

What type of bond forms when atoms share electrons?

Accepted Answer

Covalent bond

Answer

Covalent bonds form when two atoms share one or more pairs of electrons.

Question 4

What is the atomic number of an element?

Accepted Answer

The number of protons in its nucleus

Answer

The atomic number equals the number of protons, which defines the element.

Question 5

Which of the following is an example of an ionic compound?

Accepted Answer

NaCl (sodium chloride)

Answer

NaCl forms when sodium transfers an electron to chlorine, creating Na⁺ and Cl⁻ ions.

BMST - Basic Math and Science Test Practice Test