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22 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
The center of an atom is called the
nucleus
_____ and ______ make up the nucleus of an atom.
protons and neutrons
_____ orbit around the nucleus of an atom in layers or _____.
Electrons, shells.
Protons have a _____ charge.
positive
Electrons have a _____ charge.
negative
Neutrons have _____ charge
no or neutral
An element is a type of matter made up of only _____ type of _____.
one, atom.
The atoms of an element are basically _____, though the number of _____ may vary.
alike, neutrons
How is a hydrogen element different from a helium element?
They differ in the number of protons in the atom. Hydrogen atoms have one proton, and helium atoms have two protons.
The atoms of one element differ from those of another element in the number of _____.
protons
Elements are represented with _____ _______.
chemical symbols
What are the chemical symbols for oxygen, carbon, helium, and lead?
O, C, He, and Pb.
Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):

O2
two oxygen atoms
Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):

CaCO3
one calcium, one carbon, three oxygen atoms, which form calcium carbonate together.
Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):

NaCl
one sodium atom and one chlorine atom, which for sodium chloride or table salt together.
Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):

H2O
two hydrogen atoms and one oxygen atom, which for water together.
Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):

CO2
one carbon and two oxygen atoms, which for carbon dioxide together.
Compounds are represented by _____ _____.
chemical formulas.
If a chemical symbol in a chemical formula doesn't have a number to the right of it, you can assume
there is only one.
Be able to explain what is happening in this chemical equation which models the chemical change of combustion

CH4 + 2 O2 = CO2 + 2 H2O.
one methane molecule combined with two oxygen molecules burn to make one carbon dioxide molecule and two water molecules.
one methane molecule combined with two oxygen molecules equals...

you finish.
Name some of the predominant elements found in the atmosphere.
oxygen, nitrogen, carbon
Name some of the prodominant elements found in the oceans.
sodium, hydrogen, oxygen, potassium.