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WorksheetsYear 8 Unit Quiz
Total questions: 22
Worksheet time: 2hrs 50mins
The ion N3- has ______ electrons.
4
7
10
13
The ion Mg2+ has _______ protons.
10
12
14
16
The ions of the alkaline earth metals (group 2) will have a charge of ________.
-1
-2
+1
+2
The ions of the alkali metals (group 1) will have a charge of ________.
-1
-2
+2
+1
The ions of the halogen group (group 7) will have a charge of ________.
-1
-2
+2
+1
The ratio of calcium(Kalium) ions to bromine(Brom) ions in calcium bromide produces a chemical formula of
Ca2Br
CaBr2
CaBr
Ca2Br2
Comparing the neutral atom Cl with the negative ion Cl –, the negative ion has
the same number of electrons as the neutral atom.
fewer electrons than the neutral atom.
more electrons than the neutral atom.
no electrons anymore.
What charge will a phosphorous (Phosphor) ion have?
-2
-3
+3
+2
What is the chemical formula for the compound we call “table salt”?
NaCl
H2O
CO2
NaOH
Which two groups on the periodic table are most reactive?
Transition metals and alkaline earth metals
Lanthanides and noble gases
Halogens and noble gases
Alkali metals and halogens
A salt usually consists of ions from ______.
a metal and a metal
a metal and a metalloid
a metalloid and a nonmetal
a nonmetal and a metal
Which is NOT a physical or chemical property commonly found in salts?
A high melting point
dissolves easily in water
hard and brittle
low boiling point
The form of a molecule of salt is called a ______________.
crystalline structure
polar structure
cubic structure
spherical structure
What is the name of the bond that is present in salt molecules?
covalent bond
ionic bond
polar bond
metallic bond
The ratio of sodium (Natrium) ions to sulfur (Schwefel) ions in sodium sulfide produces a chemical formula of
NaS
Na2S
NaS2
Na2S2
The ratio of beryllium (Beryllium) ions to fluorine (Fluor) ions in beryllium fluoride produces a chemical formula of
BeF
Be2F
BeF2
Be2F2
The ratio of lithium (Lithium) ions to nitrogen (Stickstoff) ions in lithium nitride produces a chemical formula of
LiN
Li3N
Li2N3
LiN3
What charge would an iodine (Iod) ion have?
-1
-2
+2
+1
When we add heat to a salt molecule, what happens to the electrons?
nothing
they start vibrating faster and jump to a higher energy shell
they start vibrating slower and jump to a lower energy shell
they go away to find an energy shell from a different element
What type of energy is released from the salt molecules after we add in heat energy?
heat
sound
kinetic
light
Cations are another name for...
positive ions
negative ions
neutral atoms
elements
Cations are formed from ________ and anions are formed from ________.
nonmetals, metals
metals, metalloids
metals, nonmetals
metalloids, nonmetals
