Chapter 2.1 - Atoms, Molecules, Ions, and Bonds Flashcards Preview

AP Biology > Chapter 2.1 - Atoms, Molecules, Ions, and Bonds > Flashcards

Flashcards in Chapter 2.1 - Atoms, Molecules, Ions, and Bonds Deck (19):
1

What are the parts of an atom?

-Nucleus containing positive protons and neutral neutrons
-Electrons arranged outside

2

What are molecules?

Group of atoms held by chemical bonds

3

Why do chemical bonds between atoms form?

Due to interactions of electrons

4

What is electronegativity?

Ability of an atom to attract electrons

5

What determines the type of bond between atoms/molecules?

Electronegativity

6

3 types of bonds

-Ionic
-Covalent
-Hydrogen

7

What is an ionic bond?

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

8

Sodium and chlorine form a(n) ______ bond

ionic

9

What is a covalent bond?

Bond formed when electrons are shared between atoms

10

Difference between ionic bond and covalent bond?

Ionic - electrons are lost gained
Covalent - electrons are shared

11

What is a nonpolar covalent bond?

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

12

O2 has a ________ bond

Non polar Covalent

13

What is a polar covalent bond?

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

14

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

positive

15

H20 has a _______ bond

Polar Covalent

16

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

Negative pole near oxygen, positive near hydrogen

17

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

2, 4, and 6 in order

18

What is a hydrogen bond?

Bonds between molecules

19

What happens in a hydrogen bond?

Positive hydrogen atom attracted to negative area of another molecule