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Chemistry 9
Flashcards
37 cards
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Practice quiz
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Questions
37
Answers
1
A pure substance whose partices cannot be further borken down is a
mixture
solution
element
compound
2
Which two subatomic particles make up the most mass of an atom?
neutrons and elections
protons and neutrons
protons and electrons
electrons and neutrons
3
What is the formula for calcium phosphide
Ca2P3
CaP
Ca3P2
Ca2P
4
family is a
close knit group
column
row
5
What is the symbol of Chlorine?
Ag
Cl
C
Cn
6
Name the following compound: MnO
2
magnesium oxide
manganese (IV) oxide
manganeze (IV) oxide
manganese (II) oxide
7
Name the following compound: Cr
2
(SO
4
)
3
chromium (III) sulphate
chromium sulphate
chromium (III) sulphide
chromium (II) sulphide
8
During a physical change
a new substance is formed
particles are not changed
products are different
heat is always relased
9
What is the formula for uranium (VI) nitride
U3N6
U6N3
UN3
UN2
10
Name the following AuCl
3?
gold (III) chloride
Silver chloride
Silver (III) chloride
gold (I) chloride
11
Name the following compound: K
2
S
potassium (II) sulfide
potassium sulphide
potassium sulphur
Potassium sulfate
12
What element is this
Calcium
bromine
chlorine
potassium
13
What did Dlaton think about the atom?
has a dense center
solid sphere
raisin bun
has particles orbiting the nucleus
14
Matter is
mass and volume
mass and density
volume and conductivity
volume and density
15
Name the following compound: NH
4
H
2
PO
4
Nitrogen tetra hydride dihydrogen phosphate
ammonium ion dihydrogen phosphate
Ammonium dihydrogen phosphate
ammonium phosphate
16
What element is this bohr model of?
nitrogen
carbon
oxygen
fluorine
17
What characteristic is NOT one of the noble gases
full valence shell
reactive
gas at room temp
unreactive
18
A number which identifies an element is called the
ion charge
electron number
atomic number
mass number
19
How many valence electrons does fluorine have?
6
9
7
11
20
Which is not a sub- atomic particle?
protons
Nucleus
Neutrons
electrons
21
The elements in a chemical family all have the same number of
protons
valence electrons
shells
neurtons
22
What the the charge of an atom?
Depends on the atom
positive
negative
zero
23
Which statement is part of kinetic molecular theory?
density is a property of matter
atoms contain protons
Energy makes particles move
24
how many rings do elements in period 5 have
4
6
5
3
25
Which is not an example of a chemical change
cooking an egg
burning a match
exploding hydrogen
boiling water
26
A metalloid is
Mg
Cl
Si
Cu
27
What element is this
calcium
potassium
chlorine
Argon
28
An atom forms an ion with a 2- charge This means
lost electrons
gained electons
lost protons
29
The periodic table is organized by
atomic number and chemical properties
atomic mass and chemical properties
atomic number and density
atomic mass and density
30
The number of each type of atom in a compound's formula is given by the
subscripts
reactants
coefficient
ion charge
31
How many electrons does gold have
118
80
79
197
32
An atom has 24 protons, 24 electrons, 28 neurtons. What is the mass number?
48
52
24
140
33
What is the ionic charge for Selenium?
-1
+1
-2
+2
34
What is the charge of electrons?
postive
neutral
negative
35
how many electrons does phosphour ion have?
19
15
12
18
36
Which compound has 3 atoms in the formula
calcium oxide
calcium chloride
calcium carbonate
calcium chromate
37
What takes up the most volume of an atom?
nucleus
neutrons
protons
electrons
