Matter Chapter 4 Atoms: Building Blocks of Matter Flashcards Preview

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Flashcards in Matter Chapter 4 Atoms: Building Blocks of Matter Deck (17):
1

Nucleus

The nucleus is small, dense positively charged atom.

2

Subatomic Particle

It is a neutron, electron, or proton.

3

Proton

A proton is a subatomic particle that has a positively charge and found in the nucleus.

4

Atomic Mass

The average of the masses of the existing isotope in an element.

5

Neutron

A subatomic particle with no electric charge, and is found in the nucleus.

6

Atomic Number

It is the number of protons in the nucleus of an atom.

7

Isotope

An isotope is an element that has a different number of neutrons average element.

8

Mass Number

The sum of protons and neutrons in the nucleus of an atom.

9

Atomic Mass Unit

It is used to find the mass of a subatomic particle. (like a proton has one atomic mass unit.)

10

Electron

It is a negatively changed subatomic particle that is found in the electron cloud.

11

Electron Cloud

It is the space where electrons are most likely to be found in.

12

Energy Level

The location with in the electric cloud that an electron remains.

13

Quark

A particle that makes up all other known particles in the nucleus.

14

Electromagnetic Force

It can either attract or repel the particles on which it acts. Opposites charges attract, like charges repels.

15

Strong Force

Opposes the electromagnetic force of repulsion of the protons. The strong force "glues" the protons together to make the nucleus.

16

Weak Force

It's responsible for radioactive decay and is the decay to the power of the sun.

17

Gravity

It's the weakest force in nature. Gravity is the force of attraction between objects.