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Chemistry
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Elementary Chemistry
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
When temperature decreases during a chemical reaction...
negative charge
attraction
endothermic reaction
exothermic reaction
2
Chemistry is the study of...
liquids
colors
matter
characteristics
3
What are the vertical rows on the periodic table called?
Groups
Periods
Series
Atomic numbers
4
Which is NOT a clue of a chemical reaction?
gas formed
formed a charge
temperature change
new color
5
When temperature increases during a chemical reaction.....
ionic bonding
exothermic reaction
endothermic reaction
evidence
6
What is the symbol for sodium?
S
Sd
Ns
Na
7
What elements are are unreactive and don't mix with others?
Carbons
Noble gases
Alkalis
Halogens
8
What are atoms that rearrange and bond together in a different way?
chemical reaction
negative charge
positive charge
temperature change
9
What is a solid formed by two liquids in a chemical reaction?
boron
precipitate
base
bonds
10
What is a positive electric charge?
atom
proton
neutron
electron
11
What are the substances produced in a chemical reaction?
solids
products
reactants
atoms
12
What are the substances that combine in a chemical reaction?
reactants
elements
bases
products
13
What are the horizontal rows on the periodic table called?
Groups
Zincs
Weights
Periods
14
What is the symbol for helium?
He
Hl
Hm
H
15
What gas seeps out of volcanoes?
carbon monoxide
helium
carbon dioxide
nitrogen
16
What are atoms with specific characteristics?
elements
nucleus
energy
neutrons
17
Who first organized the elements into a table/chart?
Mendeleyev
Mendelson
Einstein
Helguson
18
Which is NOT a real world example of a chemical reaction forming a gas?
car airbag
baking soda and vinegar
volcano erupting
blowing up a balloon
19
What is the small number in the top corner of the periodic table?
atomic number
electron number
isotope number
property number
20
What happens when you add a base to a substance?
charges
becomes neutral
less acidic
more acidic
