Atomic Structure 2

Question 1

What is an ion?
A. An atom that has a different number of electrons than protons.
B. A force that holds atoms in a molecule or a substance together.
C. Different forms of the same element that have the same number of protons, but a different number of neutrons.
D. The time it takes for half a radioactive isotope to decay.

Answer 1

A. An atom that has a different number of electrons and protons.

Question 2

what determines the elemental identity of an atom?
A. Number of electron.
B. Atomic mass.
C. Number of neutron.
D. Number of protons.

Answer 2

D. Number of protons.

Question 3

which of the following is a type of chemical bond where electrons are served between atoms?
A. Covalent bond.
B. Metallic bond.
C. Hydrogen bond.
D. Ionic bond.

Answer 3

A. Covalent bond.

Question 4

which of the following describes a polar covalent bond?
A. Compare loss of electrons.
B. Transfer of electrons.
C. Unequal hearing of electrons.
D. Equal sharing of electrons.

Answer 4

C. Unequal sharing of electrons

Question 5

What is half life in the context of radioactive isotopes?
A. Time taken for isotopes to become stable.
B. Time taken for isotopes to gain electrons.
C. Time taken for half the isotopes to decay.
D. Time taken for half of the isotopes to form.

Answer 5

C. Time taken for half the isotopes to decay.

Question 6

What type of bond is formed due to the attraction between a hydrogen atom and one molecule and a highly attractive atom in another?
A. Covalent bond.
B. Hydrogen bond.
C. Ionic bond.
D. Metallic bond.

Answer 6

B. Hydrogen bond.

Question 7

What happens to the atomic number when an atom becomes an ion?
A. Decreases by one.
B. Remains the same.
C. depends on the charge.
D. Increases by one.

Answer 7

B. Remains the same.

Question 8

What change does a neutron carry?
A. Variable.
B. Neutral.
C. Negative
D. Positive.

Answer 8

B. Neutral.

Question 9

Which element’s nucleus is more attractive to electrons in a polar covalent bond?
A. Phosphorus (Atomic number: 15)
B. Hydrogen (Atomic number: 1)
C. Oxygen (Atomic number: 8)
D. Carbon (Atomic number: 6)

Answer 9

C. Oxygen (Atomic number: 8)

Question 10

Which term refers to the total number of protons and neutrons in an atoms nucleus?

A. Atomic number.
B. Ion number.
C. Mass number.
D. Electron number.

Answer 10

C. Mass number.