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Unit 2 Test Matter & Chemical Change Flashcards | StudBud
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Unit 2 Test Matter & Chemical Change
Unit 2 Test Matter & Chemical Change
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1
Ionic or Molecular?
Ionic
Molecular
2
What is the chemical formula for iron (III) oxide?
Fe2O3
FeO
Fe3O2
Fe4O6
3
Exothermic reactions..
Take in energy from the surroundings
Release energy to the surroundings
4
Which of the following is a physical property?
Ability to harden
Color
Ability to rust
Ability to burn
5
Ionic or Molecular?
Molecular
Ionic
6
[N] Which of these gasses can be regarded as a noble gas?
Nitric Oxide
Nitrous Oxide
Neon
Nitrogen
7
Which of the following is NOT one of the diatomic elements?
O
S
H
N
8
The Periodic Table groups similar ________ together.
Chemists
Elements
Symbols
Atomic numbers
9
In the periodic table, Groups are
Horizontal Row
Vertical Rows
10
Ionic or Molecular?
Molecular
Ionic
11
What is usually present in a combustion reaction?
a hydrocarbon
oxygen
sulfur
strong acids
12
Naming Molecular Compounds: hepta
5
8
6
7
13
What is a chemical change?
two or more substances combine
when new substances form
solid, liquid, and gas
change in size, shape, form, or state of matter
14
Naming Ionic Compounds
Calcium Carbonate
Calcium Trioxide
Calcium Chloride
Calcium Hydroxide
15
Even though "ionic" compounds are made from ions, the formula is ___________.
neutral
whack
positive
negative
16
What atomic number is helium?
9
7
5
2
17
Which of the following is an example of a heterogeneous mixture?
sand
jello
alloys
salt water
18
Why is a catalyst useful in chemistry?
Speeds up the chemical reaction
Slows down the chemical reaction
Causes the product to evaporate
Changes the result to a solid
19
What is a diatomic molecules?
Molecule made up of two atoms
Molecule of two elements
two compounds
20
The periodic table is arranged in order of increasing...
Atomic mass
Mass number
Color
Atomic number
21
In decomposition reactions...
many reactants make many products
one reactant makes one product
many reactants make one product
one reactant makes many products
22
Photosynthesis Products and reactants
Sunlight + Carbon dioxide + Water = Sugar + Oxygen
sugar+oxygen=Carbondioxide+water+energy
23
Naming Molecular Compounds
Sulfur Opiate
Sulfur Trioxide
Sulfur Dioxide
Sulfur Pentaoxide
24
What is the chemical formula for water?
H_3O
H^2O
H^3O
H_2O
25
The
main difference
between molecular and ionic compounds is..
Sharing electrons vs taking/giving eletrons
No clue
The strength of the bond
The way we draw them.
26
Is sulfur a metal or nonmetal?
nonmetal
metal
27
Ionic or molecular ?
ionic
molecular
28
What is the chemical formula for carbon tetrafluoride?
CF4
CB4
CF5
CF2
29
A endothermic reaction's temperature
stays the same
goes up and is warm.
goes down and cold.
30
The periodic table is arranged in order of increasing atomic...
charge
number
mass
radius
31
Naming Molecular Compounds: penta
8
5
7
6
32
What is the main difference between atoms and molecules?
Atoms are smaller and make up molecules
Molecules are smaller than atoms
Molecules are single particles
Atoms can only exist in solids
33
What are the products in the following COMBUSTION reaction?
CO and H2O
CO2 and H2O
H2O and Co2
H2O and CO2
34
Endothermic reactions
reject heat
inhale energy
take in energy
release energy
35
The charge of Electron is
Positive
None
Negative
Neutral
36
Charge of a proton.
neutral
negative
positive
37
Naming Ionic Compounds
Katasium Chloride
Potassium Chloride
Potassium Calcium
Potassium Carbonate
38
Which of the following is a physical property?
Solubility
Rusting
Flammability
Reactivity
39
Chemical formula for Magnesium oxide.
Mg2O
MgO2
MgO
40
What is the chemical formula for carbon tetrafluoride?
CB4
CF5
CF2
CF4
41
Which of the following is a double replacement reaction?
A + B = AB
AB + C = AC + B
AB + CD = AD + CB
AB = A + B
42
Which of these is a
single replacement
reaction?
Al + N2 → AlN
Ag2O → Ag + O2
Al + Fe2O3 → Al2O3 + Fe
NaF → Na + F2
43
The chemical formula for sodium oxide is ...
NaO
Na2O2
NaO2
Na2O
44
What is the electron cloud model?
it's a cloud of electrons
a fluffy ball
a rainy model
represented by electrons orbing the nucleus
45
When is your Science test?
Today
Tomorrow
Idk
Friday
46
Which group are known as the noble gases?
7
1
8
2
