Unit 2 Vocab - Introductory Chemistry Flashcards Preview

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Flashcards in Unit 2 Vocab - Introductory Chemistry Deck (25):
0

A pure substance consisting entirely of one atom

Element

1

Any substance that occupies space

Matter

2

The body that contains large quantities of these elements

Major element

3

The body that contains lesser amounts of these elements

Minor element

4

The body that contains very small amounts of these elements

Trace element

5

The most basic unit of matter

Atom

6

A particle of energy that has a positive charge

Proton

7

A particle of energy that has a negative charge

Electron

8

A particle of energy that has a neutral charge

Neutron

9

The number of protons in the nucleus of an atom, giving the atom its identity as a particular chemical element

Atomic Number

10

The total number of protons and neutrons in an atom

Mass number

11

Electrons in the outermost electron shell that are responsible for bonding

Valence Electrons

12

An atom or molecule that has lost or gained electrons and thus carried an electric charge, either positive or negative

Ion

13

A type of chemical bond in which atoms transfer valence electrons

Ionic bond

14

A type of chemical bond in which atoms share valence electrons

Covalent bond

15

A positively charged ion

Canion

16

A negatively charged ion

Anion

17

A substance made up of 2 or more atoms held together by bonds

Molecule

18

A substance composed of 2 or more elements

Compound

19

A chemical process that involves changes in the structure (and energy) content of atoms, molecules, or ions

Chemical reaction

20

A representation of an entire chemical reaction using chemical symbols and contains the products and reactants

Chemical equation

21

A letter abbreviation of a chemical element; symbols in periodic table

Chemical symbol

22

A number that is written below a letter

Subscript

23

Reference to the starting materials in a chemical reaction

Reactant

24

Reference to the ending materials in a chemical reaction

Product