CHEMISTRY 2 KEYWORDS

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created 9 years ago by THIVIYAMANAN
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Chemistry for You
Chapter 2
updated 9 years ago by THIVIYAMANAN
Grade levels:
10th grade
Subjects:
chemistry, science
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1

ELEMENT

Element is made of one type of atoms.

2

MIXTURE

It a combination of two type of elements.

3

COMPOUND

Compound is a mixture of few elements.

4

MOLECULE

A group of atom bonded together.

5

ALKALI METALS

Any of the elements in group ( 1 ) in the periodic table.

6

ALKALI EARTH METALS

Any of the elements in group ( 2 ) in the periodic table.

7

HALOGENS

Elements in group 7 which are non-metal.

8

NOBLE GASES

Gases in group (8) which are in unreactive.

9

TRANSITION METALS

Any of the set of metallic elements occupying a central block.

10

PERIODIC TABLE

A table of the chemical elements arranged in order of atomic number, usually in rows which has the same properties.

11

PERIOD

A set of elements occupying a horizontal row in the periodic table.

12

GROUP

A set of elements occupying a column in the periodic table.

13

BONDS

Is a force between particles.

14

Electrostatic force

The forces between particles that are caused by their electric charges.

15

Valency

Is the charge of the ions.For example copper has a valency of 2+.

16

Giant ionic lattice

Positive and negative ions held in place by strong electrostatic attraction between oppositely charged ions.

17

Ionic bond

It's bond between metal and non-metal.

18

Ions

An electrically charged atom or group of atoms formed by the loss or gain of one or more electrons,

19

Covalent bond

Two metals which share electrons.

20

Simple molecular substances

Low melting and boiling point and non-conductive .

21

Molten

Molten means melted into a liquid state

22

Giant covalent structure

Giant covalent structures contain a lot of non-metal atoms, each joined to adjacent atoms by covalent bonds. The atoms are usually arranged into giant regular lattices - extremely strong structures because of the many bonds involved.

23

Graphite

It a grey, crystalline, allotropic form of carbon that occurs as a mineral in some rocks .It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors.

24

Diamond

A precious stone consisting of a clear and typically colorless crystalline form of pure carbon, the hardest naturally occurring substance.

25

Buckminster Fullerenes

A form of carbon having molecules of 60 atoms arranged in a polyhedron resembling a geodesic sphere.