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Chemistry Review
Chemistry Review
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#chemistry
Flashcards
45 cards
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Questions
45
Answers
1
Which of the following elements has six shells as found on the Periodic Table?
Beryllium (#4)
Rubidium (#37)
Radium (88)
Barium (#56)
2
Select the
best
answer: what are properties of metalloids?
malleable, solid, ductile, conductive
generally a liquid or gas, nonconductive, not malleable
generally dull, somewhat malleable, conductive, and ductile
brittle, nonconductive, not malleable
3
How many atoms are in HCO
3
?
3
4
2
5
4
At what temperature does water go through solidification?
32 degrees Fahrenheit
212 degrees Fahrenheit
0 degrees Fahrenheit
100 degrees Celcius
5
Select the
best
answer: what are properties of non-metals?
somewhat malleable, solid, ductile, conductive
generally a liquid or gas, nonconductive, not malleable
dull, conductive of heat and electricity, hard
brittle, conductive, malleable
6
Why are PERIODS helpful when reading the Periodic Table?
they sort elements by color
they indicate the number energy levels an atom has
they tell how many electrons the atom has
they indicate reactivity
7
Which element, found on the Periodic Table of the Elements, has 33 electrons and no charge.
Sulfur
Arsenic
Argon
Gallium
8
The chemical symbol K represents...
Calcium
Berkelium
Krypton
Potassium
9
What is the smallest particle of matter created through chemical bonding?
nucleus
compound
atom
molecule
10
Why is the "Octet Rule" or "Rule of 8" important to know in chemistry?
it indicates possible reactivity of an element
it indicates if the element is a metal or not
eight is a magic number in chemistry
it indicates if the inner energy level is full
11
How many atoms are in calcium sulfate (CaSO
4)
?
6
5
4
3
12
Which of the following elements has three shells as found on the Periodic Table?
Boron (#5)
Beryllium (#4)
Rubidium (#37)
Sulfur (#16)
13
Which element bonds with sodium (Na) to create salt?
S
Cl
Ca
V
14
How many atoms are in H
2
O
2
?
4
2
5
3
15
How is the
atomic mass
calculated?
adding the mass of protons, neutrons and electrons
adding the mass of neutrons and protons
adding the mass of protons and electrons
adding the mass of all the protons
16
Which is the easiest way to show the movement of electrons?
orbitals
electron cloud
Heisenberg principle
Bohr model of orbits
17
Which of the following elements has three energy shells with 7 electrons in the third level?
Calcium (#20)
Bromine (#35)
Fluorine (#9)
Chlorine (#17)
18
How many elements are in H
2
O
2
?
3
4
5
2
19
How many atoms are in nitric acid (HNO
3)
?
2
3
4
5
20
How many elements are in nitric acid (HNO
3)
?
3
4
5
2
21
Ar represents which element?
silver
gold
argon
aluminum
22
Select the
best
answer: what are examples of chemical change?
rusting, fizzing
cutting, crumpling
1 & 2
baking, burning
23
At what temperature does water boil?
32 degrees Celcius
100 degrees Fahrenheit
212 degrees Fahrenheit
0 degrees Fahrenheit
24
How many elements are in ammonia (NH
3
)?
3
4
2
5
25
What does the
atomic number
represent?
number of neutrons
number of electrons
number of protons
answers 2 & 3
26
Select the
best
answer: what is a chemical change?
any kind of change you can see evidence
when 2 or more atoms create a new substance through bonding
when you can tell if a change has happened
when 2 or more atoms mix together
27
Which of the following element is a liquid at room temperature?
Neon
Sodium
Helium
Mercury
28
Why are GROUPS helpful when reading the Periodic Table?
they indicate reactivity
they sort elements by color
they tell how many electrons the atom has
they indicate the number energy levels an atom has
29
What period and group will one find Silicon (Si) ?
3rd and 18th
2nd and 2nd
1st and 4th
3rd and 14th
30
What is the chemical formula for water?
OH3
H3O
H2O
O3
31
A change from a solid to a liquid is what type of change?
physical
melting
chemical
physical and chemical
32
Which of the following element is not a Noble Gas?
Neon (Ne)
Helium (H)
Tin (Sn)
Argon (Ar)
33
What elements make up CS
2
?
lithium and flourine
cobalt and nickel
carbon and silicon
carbon and sulfur
34
Which is the MOST ACCURATE way to show the movement of electrons?
electron cloud
Bohr model of orbits
1 & 4
orbitals
35
Select the
best
answer: what are examples of physical change?
stirring, cutting, melting
baking, burning
2 & 3
rusting, fizzing, freezing
36
Which of the following elements has four shells as found on the Periodic Table of the Elements?
Rubidium (#37)
Calcium (#20)
Beryllium (#4)
Boron (#5)
37
Select the
best
answer: what are properties of metals?
malleable, solid, ductile, conductive
dull, conductive of heat and electricity, hard
brittle, conductive, malleable
Hard, shiny, not conductive of heat and electricity
38
What is the smallest particle of pure, complete matter?
atom
molecule
compound
nucleus
39
How many atoms are in ammonia (NH
3
)?
2
3
4
5
40
All elements...
All of the answers are correct.
have a boiling point.
have a freezing point.
have a melting point.
41
Which of the following is not a sub-atomic particle?
electron
proton
neutron
DNA
42
How many elements are in calcium sulfate (CaSO
4)
?
5
4
6
3
43
The chemical formula for Carbon Dioxide is
CO2
CHO
CHO3
C2O2
44
How is the
atomic weight
calculated?
averaging the mass of all protons in all isotopes- ratio
averaging the mass of protons, neutrons & electrons-ratio
averaging mass of neutrons & protons in all isotopes-ratio
averaging mass of protons & electrons in all isotopes-ratio
45
Which element has three full energy shells?
Argon
Neon
Helium
Platinum
