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Chemistry
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chemistry unit grade 4
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
What is a Noble Gas?
a gas that has happy electron orbitals
a gas that does not react
a gas that has 3 electrons
a gas from Kings
2
Atoms are mostly
empty space
energy
protons
electrons
3
Elements in groups have ...
the same letters
the same color
the same number of protons
the same number of electrons in the outer shell
4
Everything in the universe is either matter or
energy
molecules
bananas
atoms
5
Carbon is found
in all living things
in grass
in people
in plants
6
What is a molecule?
two or more atoms bonded together
Iron
an atom
protons and neutrons
7
Chemistry is the study of what?
energy
matter
reactions
water
8
Elements in periods have the same number of
protons
electron shells
electrons in the outer shell
protons in the nucleus
9
If an element is red on the periodic table, what does that mean?
It is a liquid
It is a solid
It is a gas
It is plasma
10
If an element has 18 protons, what is its atomic number?
20
14
18
16
11
Which of these are noble gasses?
neon
Helium
hydrogen
chlorine
12
What is an indicator of a chemical reaction?
formation of a new solid
temperature change
formation of a new gas
color change
13
If an element is blue on the periodic table, what does that mean?
It is a gas
It is a solid
It is plasma
It is a liquid
14
Electrons have what kind of charge?
neutral
exceptional
positive
negative
15
In a chemical reaction, a newly created solid is called a
blob
precipitate
condensation
evaporation
16
Protons have what kind of charge?
negative
positive
neutral
pretend
17
A solid
must contain carbon
has fast moving molecules
keeps its shape
takes the shape of its container
18
An element is made of
gasses
noble gasses
molecules
only one type of atom
19
The Periodic Table is
a group of molecules
a chart explaining science
a chart with elements arranged by atomic number
a list of reactions
20
What particles do NOT live in the nucleus of an atom?
electrons
energy
neutrons
protons
21
What particles live in the nucleus of an atom?
light
protons
electrons
neutrons
22
How many electrons fit happily in the third shell?
9
16
12
18
23
What two elements make up a water molecule?
oxygen and helium
oxygen and hydrogen
olfelo and hexium
hydrogen and oreos
24
What are the three basic types of matter?
gas, grass, glue
liquid, lake, lozenge
solid, silt, sugar
solid, liquid, gas
25
What is it called when a gas changes to a liquid?
evaporation
collage
camping
condensation
26
Electrons are involved in chemical reactions.
False
True
27
When a gas changes to a liquid, it is called ....
condensation
evaporation
pantheration
sublimation
28
If an element is black on the periodic table, what does that mean?
It is a solid
It is plasma
It is a gas
It is a liquid
29
Na has an atomic number of 11. How many electron are in its outer shell? Do you know WHY??
3
1
4
2
30
What type of reaction produces heat?
endothermic
exothermic
condensation
color change
