BMST Atomic Structure and Bonding 2

Question 1

Which subatomic particle determines the chemical identity of an element?

Accepted Answer

Proton

Answer

The number of protons (atomic number) uniquely identifies each element.

Question 2

What type of bond forms when one atom completely transfers an electron to another?

Accepted Answer

Ionic bond

Answer

Ionic bonds form through the complete transfer of electrons, creating oppositely charged ions that attract each other.

Question 3

An atom has 17 protons and 18 neutrons. What is its mass number?

Accepted Answer

35

Answer

Mass number equals protons plus neutrons: 17 + 18 = 35.

Question 4

Which electron shell can hold a maximum of 8 electrons?

Accepted Answer

Second shell (n=2)

Answer

The second shell (n=2) has s and p subshells, holding a maximum of 8 electrons.

Question 5

What is a polar covalent bond?

Accepted Answer

An unequal sharing of electrons due to electronegativity differences

Answer

Polar covalent bonds result from unequal electron sharing when atoms have different electronegativities.

BMST - Basic Math and Science Test Practice Test