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Gr. 12 IB First day
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How many atoms in Ca3(PO4)3
18
Dissolving is a ___________________ change
physical
Name 3 pieces of evidence that a chemical change has occurred
Heat/light, bubbles, colour change, odour change, precipitate
Argon is found in group _____
18
How many neutrons does sodium have?
12
Balance the following chemical equation: ___CH4 + ____O2 --> ___ CO2 + ___ H2O
1, 2, 1, 2
Name the following ionic compound: LiNO3
Lithium nitrate
Name the following molecular compound: N2O4
Dinitrogen tetroxide
When molecular compounds have four atoms of a particular element what prefix is used?
Tetra
Name the following molecule: NH3
Nitrogen trihydride
When nitrogen forms an ion what charge does it become?
-3
How many valence electrons does oxygen have?
6
Alkali metals (group 1) have a charge of _______when they form ions
+1
Bromine belongs to which group on the periodic table?
Halogens
A row on the periodic table is called a ________. A column on the periodic table is called a ______________.
Period
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