Chapter 2.1 - Atoms, Molecules, Ions, and Bonds

Question 1

What are the parts of an atom?

Answer 1

• Nucleus containing positive protons and neutral neutrons

- Electrons arranged outside

Question 2

What are molecules?

Answer 2

Group of atoms held by chemical bonds

Question 3

Why do chemical bonds between atoms form?

Answer 3

Due to interactions of electrons

Question 4

What is electronegativity?

Answer 4

Ability of an atom to attract electrons

Question 5

What determines the type of bond between atoms/molecules?

Answer 5

Electronegativity

Question 6

3 types of bonds

Answer 6

• Ionic
• Covalent
• Hydrogen

Question 7

What is an ionic bond?

Answer 7

Bond formed when one or more electrons are transferred from one atom to another.

Question 8

Sodium and chlorine form a(n) ______ bond

Answer 8

ionic

Question 9

What is a covalent bond?

Answer 9

Bond formed when electrons are shared between atoms

Question 10

Difference between ionic bond and covalent bond?

Answer 10

Ionic - electrons are lost gained

Covalent - electrons are shared

Question 11

What is a nonpolar covalent bond?

Answer 11

Covalent bond where electrons are shared equally and the electronegativities are identical

Question 12

O2 has a ________ bond

Answer 12

Non polar Covalent

Question 13

What is a polar covalent bond?

Answer 13

Covalent bond where electrons are shared unequally and the electronegativities are different

Question 14

In a polar covalent bond, the area with a weaker pull on electrons is the _____ pole

Answer 14

positive

Question 15

H20 has a _______ bond

Answer 15

Polar Covalent

Question 16

In the H20 bond, where is there a negative pole? Positive pole?

Answer 16

Negative pole near oxygen, positive near hydrogen

Question 17

In single/double/triple covalent bonds, how many electrons are shared?

Answer 17

2, 4, and 6 in order

Question 18

What is a hydrogen bond?

Answer 18

Bonds between molecules

Question 19

What happens in a hydrogen bond?

Answer 19

Positive hydrogen atom attracted to negative area of another molecule