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Chemistry!!
Chemistry!!
25 terms
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Show me what you learned in Chemistry class this year.
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
What is a valence electron?
the electron that is nuetral
outermost orbital electron
electron close to the nucleus
2
Why do atoms share electrons in covalent bonds?
atoms do not share electrons
to become ions and attract each other
to become more polar
to attain a noble-gas electron configuration
3
In atoms, these are responsible for all chemical reactions.
protons
electrons
neutrons
4
What is the name of this compound? H
2
O
2
dihydrogen dioxide
dihydrogen monoxide
hydrogen dioxide
monohydroxide
5
Most elements are found in nature in this state of matter:
solid
liquid
gas
plasma
6
This variable is observed and measured in an experiment.
control
dependent
independent
constant
7
Which of the following categories includes the majority of the elements?
nonmetals
liquids
metalloids
metals
8
What causes leaves to fall in autumn? The light, temperature or both? Dependent variable?
both
temperature
light
leaves falling
9
What is the name of this lab equipment?
beaker
test tube
florence flask
graduated cylinder
10
Which of the following was a major contribution to chemistry by Antoine Lavoisier?
IDK.OMG.LOL
He demonstrated the presence of phlogiston in air.
He encouraged scientists to form explanations based on guess
He showed that oxygen is required for material to burn.
11
Which is the chemical formula for calcium chloride?
Ca2Cl3
CaCl6
CaCl2
CaCl
12
In an atom, these carry a positive charge.
electrons
neutrons
protons
13
A horizontal row of the periodic table is usually referred to as a
column
period
family
group
14
What is the number of electrons in the outermost energy level of an oxygen atom?
3
8
6
1
15
The smallest particle of an element that retains the properties of that element is a(n)
atom
quark
proton
electron
16
What is the first thing you do if you get a chemical in your eyes?
use the eyewash
run to the chemical shower
call your parents
rub your eyes
17
Chemistry is:
the study of matter and its changes
the study of nonliving things
the study of the stars and planets
the study of living things
18
All atoms are
neutral, with protons equaling electrons.
positively charged, with protons exceeding electrons
negatively charged, with electrons exceeding protons.
none of these
19
The modern periodic table is arranged in order of increasing atomic ____.
charge
number
reaction
mass
20
Do not contain carbon.
inorganic
analytical
physical chemistry
organic
21
The study of processes that take place in organisms.
organic chemistry
analytical chemistry
inorganic chemistry
biochemistry
22
Is acid rain causing a decline in frog populations? What is the independent variable?
constants of the experiment
acid rain
the control group
frog populations
23
The expression of 5008 km in scientific notation is ____.
5.008 x 10-3 km
5.008 x 103 km
50.08 x 10-4 km
24
This is the first picture of Earth from space. What was it named?
Moonunit
Earth calling
Earthsleeping
Earthrise
25
Which of the following is a physical property?
explosive device
melting point
cooking eggs
combustible liquids
