Atoms, Elements and Compounds

Created by Isobel_S 

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12 terms · Yr 9 work?

Proton

a subatomic particle that has a positive charge and that is found in the nucleus of an atom

Neutron

a subatomic particle that has no charge and that is found in the nucleus of an atom

Electron

negatively charged particle; located outside the atomic nucleus

Mendeleev

Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907)

Atomic Number

the number of protons in the nucleus of an atom

Atomic Mass

total mass of the protons and neutrons in an atom, measured in atomic mass units

Positively Charged Atom

more protons than electrons

Negatively Charged Atom

more electrons than protons

Noble Gas

any of the chemically inert gaseous elements of the helium group in the periodic table

Limewater Test

when CO2 is mixed with lime water, it makes calcium carbonate (blew through straw into lime water, gave off CO2) and the limewater turns milky- proving the existence of CO2

Splint Test

Identifies common lab gases (O2) by inserting a glowing wooden splint into a test tube with unknown gas

Pop Test

The captured gas is lit and if it makes a 'pop' sound then it is known to be hydrogen gas

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