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Flashcards in Chapter 2 Deck (20):
0

Smallest unit of matter that enters into chemical reactions.

Atom

1

What is the charge of a proton?

Positive +

2

What is the charge of a neutron

No charge.

3

What is the charge of a electron?

Negative -

4

The atomic number is equal to____

Protons

5

The atomic weight is equal to _____

Protons+neutrons+electrons

6

Isotopes of an element are atoms with different __________________

Numbers of neutrons

7

First shell____
Second shell ____
Third shell ____

-2
-8
-8

8

What is the outermost shell called?

Valence

9

Which particle is found in the nucleus of an atom and has no electrical charge?

Neutron

10

2 particles found in the nucleus?

Protons and neutrons

11

Isotopes are atoms of the same element that differ in _____

Neutrons

12

The number of protons and electrons in a neutral atom are _____

Equal

13

Give up electrons (positive)

Cation

14

Need electrons. (Negative)

Anion

15

When atoms combine by sharing or transferring valence electrons

Chemical bonds

16

Two or more atoms held together by chemical bonds. Example: H2O

Molecule

17

A molecule composed of more than one element.

Compound

18

Only the _______ of atoms interact, so they determine an atoms chemical behavior.

Electrons

19

3 principal types of chemical bonds.

-ionic bonds.
-covalent bonds.
-hydrogen bonds.