A
B
C
D
E
100
Leaves burning is an example of a __________ change.
What is chemical?
100
Water boiling is an example of a _____________ change.
What is physical?
100
In a _____________ molecules are very close together and vibrate.
What is a solid?
100
In a _____________ molecules are together and move around.
What is a liquid?
100
In a _____________ molecules are far apart and move very fast.
What is a gas?
200
These are found in the center of an atom.
What are protons and neutrons?
200
This is the atomic number of oxygen (O).
What is 8?
200
This is the atomic mass of carbon (C)?
What is 12?
200
This is the atomic mass of helium (He).
What is 2?
200
This can be found outside the nucleus of an atom.
What are electrons?
300
Pb, lead, has this many protons.
What is 82?
300
Fe, iron, has this many electrons.
What is 26?
300
Au, gold, has this many protons.
What is 79?
300
S, sulfur, has this many electrons.
What is 16?
300
Al, aluminum, has this many protons and this many electrons.
What is 13?
400
This is the symbol for magnesium (atomic number 12).
What is Mg?
400
Cl, chlorine is a __________________ (metal, nonmetal, or metalloid).
What is nonmetal?
400
The element with atomic number 14 is a __________________ (metal, nonmetal, or metalloid).
What is metalloid?
400
The element with atomic number 55 is a __________________ (metal, nonmetal, or metalloid).
What is metal?
400
This is the symbol for xenon (atomic number 54).
What is Xe?
500
Cesium, Cs, has this many neutrons.
What is 78?
500
Silver, Ag, has this many neutrons.
What is 61?
500
The element with atomic number 80 has this many neutrons.
What is 120.6?
500
The element with atomic number 54 has this many neutrons.
What is 77?
500
The element with atomic number 13 has this many neutrons.
What is 14?
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