Basic Chem

Question 1

What is the smallest unit of matter?

Answer 1

An atom.

Question 2

True or False: A molecule is made up of two or more atoms bonded together.

Answer 2

True.

Question 3

Fill in the blank: An ion is an atom that has gained or lost ______.

Answer 3

electrons.

Question 4

What is the charge of a cation?

Answer 4

Positive.

Question 5

What term describes a negatively charged ion?

Answer 5

Anion.

Question 6

Which of the following is a type of atomic bond? (a) Ionic (b) Covalent (c) Metallic (d) All of the above

Answer 6

All of the above.

Question 7

True or False: Ionic bonds involve the sharing of electrons.

Answer 7

False.

Question 8

What type of bond forms when electrons are shared between atoms?

Answer 8

Covalent bond.

Question 9

How many electrons are typically found in the outer shell of a stable atom?

Answer 9

Eight.

Question 10

Fill in the blank: The atomic number of an element is determined by the number of ______ in its nucleus.

Answer 10

protons.

Question 11

What is the term for the force that holds atoms together in a molecule?

Answer 11

Chemical bond.

Question 12

What is a common example of a covalent compound?

Answer 12

Water (H2O).

Question 13

True or False: All ionic compounds are soluble in water.

Answer 13

False.

Question 14

What is the main difference between an atom and a molecule?

Answer 14

An atom is a single unit, while a molecule is made up of two or more atoms bonded together.

Question 15

What type of bond is formed between sodium (Na) and chlorine (Cl) in sodium chloride (NaCl)?

Answer 15

Ionic bond.

Question 16

What is the octet rule?

Answer 16

Atoms tend to bond in such a way that they have eight electrons in their valence shell.

Question 17

True or False: Electrons have a positive charge.

Answer 17

False.

Question 18

What do you call a chemical bond formed by the attraction between positively charged ions and negatively charged ions?

Answer 18

Ionic bond.

Question 19

Which particle is found in the nucleus of an atom?

Answer 19

Proton.

Question 20

What is the charge of a neutron?

Answer 20

Neutral.

Question 21

Fill in the blank: The number of neutrons in an atom can be found by subtracting the atomic number from the ______.

Answer 21

mass number.

Question 22

What is a polar covalent bond?

Answer 22

A bond where electrons are shared unequally between atoms.

Question 23

What is the term for the ability of an atom to attract electrons in a bond?

Answer 23

Electronegativity.

Question 24

True or False: All atoms of the same element have the same number of protons.

Answer 24

True.

Question 25

What is the significance of valence electrons?

Answer 25

They determine how an atom can bond with other atoms.