Hon. Chem. Unit 3 Vocab.

Front 1

Atom

Back 1

The basic unit of an element.

Hint 1

Carbon. Atoms are made of Protons, Neutrons, and Electrons.

Front 2

Atomic Mass

Back 2

the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number).

Hint 2

Proton plus Neutron

The Atomic Mass is determined with its proton and

Front 3

Atomic Mass Unit

Back 3

a unit of mass used to express atomic and molecular weights.

Hint 3

1/12 Carbon Atoms

the Atomic Mass Unit has a Carbon 12 unit involved in it.

Front 4

Atomic Number

Back 4

the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Hint 4

5

The Atomic Number is determined by floating particles.

Front 5

Atomic Symbol

Back 5

The symbol of the element.

Hint 5

Au

The Atomic Symbol gives only a little information about the element.

Front 6

Chemical Symbol

Back 6

A chemical symbol is a code for a chemical element. It is usually derived from the name of the element, often in Latin. This is an example of an atomic symbol. The text boxes explain where the numbers are derived from.

Hint 6

Chemical codes.

the chemical symbol is listed in the periodic table.

Front 7

Electron

Back 7

a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

Hint 7

Small thing in electron cloud

The electron

Front 8

Group

Back 8

a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, but the f-block columns (between groups 2 and 3) are not numbered.

Hint 8

Metalloids

there are a few groups on the periodic table

Front 9

Isotope

Back 9

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Hint 9

Carbon 14

most cells have either isotopes or

Front 10

Mass Number

Back 10

An integer equal to the sum of the number of protons and neutrons of an atomic nucleus.

Hint 10

Cl mass nmbr: 37

Front 11

Metal

Back 11

such a substance in its pure state, as distinguished from alloy

Hint 11

Gold.

All metals are located on the periodic table.

Front 12

Metalloid

Back 12

a nonmetal that in combination with a metal forms an alloy.

Hint 12

Silicon.

Metal loads are on the staircase of the periodic table.

Front 13

Neutron

Back 13

a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

Hint 13

Subatomic Particle.

they play a key role in isotopes.

Front 14

Nonmetal

Back 14

an element or substance that is not a metal.

Hint 14

Oxygen.

they are located on the right side of the periodic table.

Front 15

Nucleus

Back 15

The central part of an atom that contains the protons and neutrons.

Hint 15

Carbon nucleus

protons and neutrons do something here.

Front 16

Period

Back 16

a length or portion of time.

Hint 16

Time moving.

a period of time is needed for h

Front 17

Proton

Back 17

a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

Hint 17

Positively charged particle.

it is one of the sub

Front 18

Subatomic Particles

Back 18

Any of various units of matter below the size of an atom, including the elementary particles and hadrons.

Hint 18

Proton.

it includes three well known particles that make ______.