Science Chapter 3 Vocab Flashcards Preview

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Flashcards in Science Chapter 3 Vocab Deck (39)
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Atom

Smallest particle that can still be considered and element

1

Electrons

A tiny, negatively charged particle that moves around the outside of the nucleus of an atom.

2

Nucleus

The central core of an atom which contains protons and neutrons

3

Protons

Small, positively charged particles that are found in the nucleus of an atom.

4

Energy level

A region of an atom in which electrons of the same energy are likely to be found.

5

Neutron

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

6

Atomic number

The number of protons in the nucleus of an atom.

7

Isotopes

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

8

Mass number

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

9

Atomic mass

The average mass of all the isotopes of an element.

10

Periodic Table

An arrangement of the elements showing the repeating pattern of their properties.

11

Chemical Symbol

A one- or two-letter representation of an element.

12

Periods

1. A horizontal row of elements in the periodic table

13

Metals

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

14

Group

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

15

Luster

The way a mineral reflects light from its surface.

16

Malleable

A term used to describe material that can be hammered or rolled into flat sheets.

17

Ductile

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

18

Thermal Conductivity

The ability of an object to transfer heat.

19

Electrical Conductivity

The ability of an object to carry electric current.

20

Reactivity

The ease and speed with which an element combines, or reacts, with other elements and compounds.

21

Corrosion

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

22

Alkali Metals

An element in Group 1 of the periodic table.

23

Alkaline Earth Metals

An element in Group 2 of the periodic table.

24

Transition Metals

One of the elements in Groups 3 through 12 of the periodic table.

25

Nonmetal

An element that lacks most of the properties of a metal.

26

Diatomic Molecule

A molecule consisting of two atoms.

27

Halogens

An element found in Group 17 of the periodic table.

28

Noble gases

An element in Group 18 of the periodic table.

29

Metalloid

An element that has some characteristics of both metals and nonmetals.