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WHS - Unit 1 Chemistry Flashcards | StudBud
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WHS - Unit 1 Chemistry
WHS - Unit 1 Chemistry
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Quiz covering chemistry, periodic table, and bonding. #chemistry #periodictable #elements
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
What group is the element in below?
4
12
14
6
2
Look at the element key for tin. How many protons in a tin atom?
16
69
119
50
3
Which element is in Period 4 and Group 6 ?
Titanium
Chromium
Vanadium
Selenium
4
In which group are diatomic molecules found?
17
18
1
7
5
Aluminum metal melts at 0 °C. What is the melting point of aluminum in Kelvin?
273 K
100 K
0K
-273 K
6
What is the mass of a sample that has a volume of 20.0 mL and a density of 4.0 g/mL?
20 g
80 g
2 g
40 g
7
When water is heated until it changes from the liquid state to the gaseous state, it is called:
A rearrangment of molecules
A decomposition into its elements
a chemical change
a physical change
8
A can of soda has a mass of 750 g and a volume of 355 mL. What is its density in g/mL?
1.2 g/mL
266 g/mL
81 g/mL
2.1 g/mL
9
Which of the following represents the smallest particle of an element?
H2O
N2
CO
K
10
What is the molar mass of CaCl
2
40 g/mol
71 g/mol
111 g/mol
156 g/mol
11
An object was placed in 21.20 mL water. The water rose to 27.80 mL, mass = 22.40 g, cal density
1.02 g/mL
3.39 g/mL
1.3 g/mL
0.81 g/mL
12
What element is shown in the atomic model below?
beryllium
magnesium
manganese
chromium
13
Law of conservation of mass: the mass of the products must be ____ the mass of the reactants.
less than
more
equal to
greater than
14
Theobromine,a chemical in chocolate, has the formula C
7
H
8
N
4
O
2.
What elements and how many atoms?
7 carbon, 8 hydrogen, 4 nitrogen, 2 oxygen
6 carbon, 8 hydrogen, 4 nitrogen, 2 ozone
6 copper, 8 hydrogen, 4 nickel, 2 oxygen
7 carbon, 8 hydrogen, 4 nickel, 2 oxygen
15
How many hydrogen atoms would be in a mole of water, H
2
O, molecules?
2
18 g
2 x (6.02 x 1023)
6.02 x 1023
16
Which particle is
NOT
found in the nucleus of an atom?
neutron
electron
proton
17
A
row
of elements on the periodic table is called a ______________.
family
period
set
group
18
Which of the following is an organic molecule?
CaO
C
CH4
Co
19
How many molecules in 1/2 mole of Neon gas?
3.01 x 1023
6.02 x 1023
1/2
6.02 x 10-23
20
How many moles of magnesium are in 7.2 X 10
21
atoms of magnesium?
4.43 x 1045
4.43
0.012
1.2 x 1045
