Chapter 2 Vocab

Question 1

Atom

Answer 1

basic building black of matter composed of electrons, protons, and neutrons.

Question 2

Atomic Mass Number

Answer 2

The number of protons and neutrons an atoms has in its nucleus

Question 3

Atomic Number

Answer 3

The number of protons an atom contains in its nucleus

Question 4

Binding Energy

Answer 4

A force of attraction that holds the nucleus of an tom together and holds electrons in orbit.

Question 5

Compound

Answer 5

The combination of elements in definite proportions

Question 6

Covalent Bond

Answer 6

an atomic bond in which an outermost electron from one atom begins to orbit the nucleus of another adjacent atom in addition to its original nucleus

Question 7

Electron

Answer 7

Subatomic particle with one unity of negative electrical charge

Question 8

Electron Shell

Answer 8

A defined energy level at a distance from the nucleus within which electrons orbit

Question 9

Element

Answer 9

A substance that cannot be broken down into simpler parts by ordinary chemical means.

Question 10

Ionic Bond

Answer 10

An atomic bond in which one atom gives up an electron and another atom takes the extra electron and the difference in their electrical charge attracts and bonds the two together.

Question 11

Molecule

Answer 11

Fixed ratios of each type of constituent atom resulting in a predictable mass.

Question 12

Neutron

Answer 12

Subatomic particle with no electrical charge

Question 13

Nucleus

Answer 13

The central core of an atom made up fundamentally of protons and neutrons.

Question 14

Proton

Answer 14

Subatomic particle with one unit of positive electrical charge.