p104-124 Flashcards Preview

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Flashcards in p104-124 Deck (23):
1

electron

A negatively charged particle that is found outside the nucleus of an atom

2

energy level

The specific amount of energy an electron has

3

nucleus

The central core of the atom

4

neutron

A small particle in the nucleus of the atom, with no electrical charge.

5

atomic number

The number of protons in the nucleus of an atom

6

isotope

An atom with the same numbers of protons and a different number of neutrons from other atoms of the same element

7

mass number

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

8

atomic mass

The average mass of all the isotopes of an element

9

periodic table

A chart of the elements showing the repeating pattern of their properties

10

group

Elements in the same vertical column of the periodic table; also called a family

11

period

A horizontal row of elements in the periodic table

12

chemical symbol

A one or two-letter representation of an element

13

nuclear fusion

The process in which two atomic nuclei combine to form a larger nucleus, forming a heavier element and releasing huge amounts of energy

14

plasma

A gas-like state of matter consisting of a mixture of free electrons and atoms that are stripped of their electrons

15

ductile

A term used to describe a material that can be pulled out into a long wire

16

malleable

A term used to describe material that can be pounded into shapes

17

metal

A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity.

18

conductivity

The ability of an object to transfer heat or electricity to another object

19

corrosion

The gradual wearing away of a metal element due to a chemical reaction

20

alkali metal

An element in Group 1 of the periodic table

21

alkaline earth metal

An element in Group 2 of the periodic table

22

alloy

A mixture of two or more elements, one of which is a metal

23

particle accelerator

A machine that moves atomic nuclei at higher and higher speeds until they crash into on another, sometimes forming heavier elements