Chemical Element Properties

Front 1

Atom

Back 1

The smallest particle of an element

Hint 1

Chemical reactions occur when different atoms and molecules combine together and spit apart

Front 2

Atomic mass

Back 2

The mass of an atom in atomic mass units;the average mass of the atoms of an element

Hint 2

The atomic mass of Hydrogen is 1.00794

Front 3

Atomic mass unit

Back 3

One-twelfth the mass of the12 6C atom

Hint 3

12 6 C

Front 4

Atomic number

Back 4

The number of protons in the nucleus of an atom

Hint 4

The mass number of an Atom includes the total number of protons and neutrons found in it's nucleus,eg:the mass number of Aluminum is 13

Front 5

Atomic symbol

Back 5

The atom of each element is made up of electrons, protons and neutrons. All atoms of the same neutral element have the same number of protons and electrons but the number of neutrons can differ. Atoms of the same element but different neutrons are called isotopes.

Hint 5

1. The symbol X: the usual element symbol
2. The atomic number A: equal to the number of protons (placed as a left subscript)
3. The mass number Z: equal to the number of protons and neutrons in the isotope (placed as a left superscript)

Front 6

Chemical Symbol

Back 6

A notation using one to three letters to represent an element.

Hint 6

Uno" was the temporary symbol for hassium which had the temporary name of unniloctium and "Uuo" is the symbol for ununoctium (temporary name) with the atomic mass 118.

Front 7

Electron

Back 7

An elementary particle with unit negative charge

Hint 7

an electron is the smallest unit of matter that has a negative charge. this charge is 1.602 x 10-19 C.

Front 8

Group

Back 8

The element of a vertical column in the periodic

Hint 8

Elements in a family all share similar characteristics, whether they be physical or chemical. There are 18 family (or group) columns in the periodic table.

Front 9

Isotope

Back 9

One of two or more atoms having the same number of protons but different numbers of neutrons

Hint 9

Carbon 12 and Carbon 14 are both isotopes of carbon , one with 6 neutrons and one with 8

Front 10

Mass number

Back 10

The total number of protons and neutrons in an atom

Hint 10

37 17 Cl has a mass number of 37. Its nucleus contains 17 protons and 20 neutrons.

Front 11

Metal

Back 11

An element that tends to lose electrons in chemical

Hint 11

Examples of heavy metals include lead, mercury and cadmium. Less commonly, any metal with a potential negative health effect or environmental impact may be termed a heavy metal, such as cobalt, chromium, lithium and even iron.

Front 12

Metalloid

Back 12

An element that has properties characteristic of a metal and a nonmet

Hint 12

Examples: silicon , boron

Front 13

Neutron

Back 13

A neutron subatomic particle;a hadron

Hint 13

The neutron is the particle in the atomic nucleus with a mass = 1 and charge = 0.

Front 14

Nonmetal

Back 14

An element that tends to gain electrons in chemical reactions

Hint 14

H2 O2

Front 15

Nucleus

Back 15

An atom of a specific

Hint 15

by a factor of about 23,000 (uranium) to about 145,000 (hydrogen).[citation needed]

Front 16

Period

Back 16

A horizontal row of period table

Hint 16

The first period contains fewer elements than any other, with only two, hydrogen and helium.

Front 17

Proton

Back 17

A biological polymer of amino acids linked by amide groups

Hint 17

The nucleus of a hydrogen atom . The H + ion .

Front 18

Subatomic particle

Back 18

A particle smaller than

Hint 18

Examples: Electrons, protons and neutrons are all subatomic particles.