Chapter 8 Electrons Show The Way

Question 0

Very light particle that orbits the nucleus of the atom. It has a negative charge

Answer 0

Electron

Question 1

Energy from heat or light

Answer 1

Radiant

Question 2

Heavy particle inside the nucleus of the atom. It has a positive charge

Answer 2

Proton

Question 3

Heavy particle inside the nucleus of the atom with protons. It has a neutral charge

Answer 3

Neutron

Question 4

The center of the atom which is tightly packed with protons and neutrons

Answer 4

Nucleus

Question 5

Radiation given off by radioactive elements

Answer 5

Alpha rays

Question 6

Atoms are empty space with a mass concentrated in a dense central nucleus which is tiny and heavy. Very light electrons circle the nucleus.

Answer 6

Planetary model of the atom

Question 7

He used the spectroscope to find thallium

Answer 7

William Crookes

Question 8

It means incapable of being cut

Answer 8

Atom

Question 9

He showed that matter is made of of atoms and elements could only be divided until there was a single atom

Answer 9

John Dalton

Question 10

It measures the strength of radiant energy and was developed by William Crookes

Answer 10

Radiometer

Question 11

He developed the planetary model of the atom

Answer 11

Ernest Rutherford

Question 12

These gases have a valence of zero

Answer 12

Inert or noble gases

Question 13

Chemical reactions take place when atoms do what with their electrons?

Answer 13

Gain, lose or share

Question 14

He discovered atoms have neutrons which have no charge and have the same weight as protons

Answer 14

James Chadwick

Question 15

They are the building blocks of matter

Answer 15

Atoms

Question 16

The electron is lighter than the lightest gas

Answer 16

Hydrogen