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Chemistry Unit 2 Review Flashcards | StudBud
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Chemistry Unit 2 Review
Chemistry Unit 2 Review
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Middle school review game for chemistry unit
Flashcards
29 cards
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Practice quiz
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Questions
29
Answers
1
The type of element best used to make a wire is a
non-metal
metalloid
noble gas
metal
2
Which of the following correctly describes a solution?
A heterogeneous mixture of solutes and solvents
A hetergenous mixture of solutes
A solvent dissolved in a solute
A solute dissolved in a solvent
3
How is the modern periodic table organized?
By state
By atomic mass
By atomic number
By color
4
You know the number of valence electrons an element has by its
atomic mass
period number
group number
atomic number
5
Which other element would have the most similar properties to Phosphorus?
Arsenic
Sulfur
Silicon
Nitrogen
6
In the compound Na
2
SO
4
, what is the ratio of Na:S?
2:1
2:4
1:1
1:2
7
A covalent bond forms when...
One atom steals an electron from another
Two atoms share a pair of electrons
Two atoms share an electron
Two atoms with opposite charges are attracted to each other
8
Look at the element below. How many electrons does a neutral atom have?
55
80
25
30
9
The maximum # of electrons in each of the first shells is
2-4-8
1-4-8
2-8-8
3-5-7
10
Which family is most likely to form negative ions?
alkaline eath metals
halogens
metalloids
noble gases
11
An important difference between compounds and mixtures is...
Compounds have more properties than mixtures
Compounds contain molecues and mixtures don't
Compounds are bigger than mixtures
Compounds are combined chemically and mixtures physically
12
An electron dot diagram shows...
The valence electrons
The missing electrons
The electron configuration
The extra electrons
13
A non-neutral atom is called a(n)...
isomer
ion
isotope
covalent
14
Look at the element below. How many neutrons does the most common isotope have?
55
30
80
25
15
What does the atomic number tell you?
The number of neutrons in the atom
The number of protons in the atom
The mass of an atom
The charge on an atom
16
The _____________ tells you how many electron shells an element will have.
group number
atomic number
period number
family
17
The most reactive elements are
noble gases
alkali metals
lanthanides
transition metals
18
How many atoms are in one molecule of Na
2
SO
4
?
6
10
9
7
19
As you move from left to right through the metals on the periodic table, what happens?
They get more conductive
They get smaller
They get more reactive
They get less reactive
20
In a neutral atom which two things are the same?
protons and atomic mass
protons and neutrons
electrons and protons
neutrons and electrons
21
The two main numbers in each square of the periodic table are the
Number of isotopes and number of ions
Atomic number and number of neutrons
atomic number and atomic mass
Number of protons and number of neutrons
22
Find Phosphorus in the Periodic Table below. How many valence electrons does it have?
15
5
3
31
23
Which of the following families contains non-metals?
lanthanides
alkaline earth metals
metalloids
halogens
24
An ionic bond forms when...
Two atoms with opposite charges are attracted to each other
Two atoms share an electron
One atom steals an electron from another
Two atoms share a pair of electrons
25
Which of the following is NOT an example of a heterogeneous mixture?
granola bar
butter
fruit salad
guacamole
26
How did Mendeleev organize his periodic table?
By atomic mass
By state
By atomic number
By color
27
Isotopes are versions of atoms with different....
numbers of neutrons
numbers of electrons
electric charges
numbers of protons
28
The least reactive elements are
lanthanides
non-metals
transition metals
noble gases
29
The smalles unit of a compound is a(n)
molecule
atom
bond
mixture
