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AOI matter and density review Flashcards | StudBud

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AOI matter and density review

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a review for 7th grade chemistry that included the periodic table, matter, density, chemical/physical changes, elements, atomic number protons, electrons, groups and periods

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Questions 13

Answers

1
what is matter?
anything that lives and grows
anything that occupies space and has mass
anything that occupies space and has gravity
all the stuff around us
2
what is the element potassium's symbol?
Po
P
K
Ta
3
who discovered Density
Archimedes
Apollo
Caligula
xerxes
4
within the periods or rows...
patterns of similar characteristics will occur along a row
there are similar characteristics
the elements react the same way
5
which of these are physical changes?
cutting your fingernails
freezing lemonade
melting an ice cube
cutting grass
6
The metalloid line separates the periodic chart into ?
metals and nonmetals
metalloids
gases and liquids
7
what is a group on the periodic chart?
columns (vertical)
elements that are not similar
elements that are similar
rows (horizontal)
8
what is the formula for density
Density = volume\mass
density = mass divided by the density of water
Density = mass\volume
mass = volume divided by liters
9
which of these elements will react violently with water?
alkali
alkal
alkanes
alkaline
10
which of the following elements are nonmetals
calcium and barium
silver and bismuth
silicon and sulfur
selenium and zinc
11
what are electrons?
positively charged particles in an atom
negatively charged particles in an atom
neutrally charged particles in an atom
12
which of the following are chemical changes?
burning logs
fireworks set off
baking bread
souring milk
13
what element has 0 neutrons?
Neon
Oxygen
Hydrogen
Helium