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7th Grade Chemistry Flashcards | StudBud
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7th Grade Chemistry
7th Grade Chemistry
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7th grade chemistry
Flashcards
36 cards
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Questions
36
Answers
1
Sodium catches fire when it hits water. What is happening?
Magic
Conducting
Lustering
A reaction
2
A compound is two or more elements chemically bound
that is made up of a single type of atom
that keep their properties
that lose their properties and create a new substance
that break easily
3
Periods are the ______ rows in a periodic table.
Vertical
Horizontal
Diagonal
Zig-zag
4
A malleable metal means?
it has a high melting point
it is very reactive
It can be shaped with pressure
it conducts electricity
5
What is the symbol for Sodium?
Sd
Na
K
So
6
These spoons are an example of...
Malleable
Dense
Conductor
Reactive
7
True or False: There are more metals than non-metals on the periodic table.
True
False
8
Alkali Metals are known to be the least reactive metals on the periodic table.
True
False
9
An atom is made up of proton, electron, and ________
DNA
Matter
Neutron
Oxygen
10
Physical/Chemical Change: Water boiling
Chemical Change
Physical Change
11
The _____ number is the amount of protons or electrons in an atom.
Phone
Jersey
Mass
Atomic
12
The atomic mass (mass number) of an element is equal to ______
# of neutrons+protons
# of electrons+protons
# protons
# of electrons
13
What element is in group 16, period 3
Sulfur
Carbon
Magnesium
Oxygen
14
Chemical/Physical Change: Fermenting cheese
Physical Change
Chemical Change
15
Who was the genius that created the periodic table and got it right the first time?
Albert Einstein
Ernest Rutherford
Dmitri Mendeleev
16
The periodic table has vertical columns called ________
Rows
Periods
Groups/ families
Tables
17
What is the atomic number of Boron (B)?
5
10
2
18
18
An example of an Alkali Metal is....
"Open" sign
Phone cord
Battery
Banana
19
Lead is an example of a
Pencil
Element
Compound
Mixture
20
Brittle means?
Easily cracked or fractured
Man-made
soft and bendable
Smooth
21
A collection of elements on the periodic table with similar properties are....
Periods
Tables
Compounds
Families
22
True or False: Poor metals have a high melting point?
True
False
23
An example of a poor metal is.....
Tin-man
Penny
Superman's home planet
Pop can
24
The transition metals are in which groups/families
18
3-12
13-15
1
25
Element is
made up of compounds and mixtures
is not on the periodic table
made up of the same type of atoms
made of different types of atoms
26
True/False - The Noble Gases are very reactive.
True
False
27
Metalloids have characteristics of
metals
Neither metals nor non-metals
Non-metals
Both metals and non-metals
28
What periodic group is Chlorine (Cl) located in?
Noble Gases
Alkali Metals
Halogens
Transition Metals
29
True/False - Electrons are in the nucleus.
True
False
30
Reactive means ________
Reflects light
Man-made
Responds to other elements
transfers electricity and heat
31
NaCl is an example of a
Mixture
Liquid
Compound
Element
32
What is the basic building block of an element?
Atom
Electron
Proton
Matter
33
There can be up to ____ electrons in the 2nd energy shell.
18
2
8
4
34
A diamond has what characteristics?
Reactive and lusterous
Luster and dense
synthetic and dense
Dull and dense
35
A proton has a _______ charge
Electric
Positive
Neutral (No Charge)
Negative
36
Which element is an example of a strong conductor?
Helium
Oxygen
Copper
Chlorine
