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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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review game for chemistry unit two
Flashcards
38 cards
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Practice quiz
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Questions
38
Answers
1
An electron dot diagram shows...
The valence electrons
The missing electrons
The extra electrons
The electron configuration
2
The definintion of metal reactivity is the tendancy of a metal to react.
True
False
3
How many atoms are in one molecule of Na
2
SO
4
?
9
10
6
7
4
The smalles unit of a compound is a(n)
atom
molecule
mixture
bond
5
Group 17(Halogens)are brittle in the solid state, and they are
have high melting and boiling points
good conductors of electricity
contain 6 valence electrons
poor conductors of electricity
6
Who dicovered the proton?
Thomson in 1904
Rutherford in 1911
Democritus in 400 B.C
Bohr in 1913
7
An important difference between compounds and mixtures is...
Compounds are combined chemically and mixtures physically
Compounds contain molecues and mixtures don't
Compounds are bigger than mixtures
Compounds have more properties than mixtures
8
Which other element would have the most similar properties to Phosphorus?
Arsenic
Nitrogen
Silicon
Sulfur
9
The maximum # of electrons in each of the first shells is
2-8-8
2-4-8
1-4-8
3-5-7
10
Which of the following families contains non-metals?
halogens
metalloids
alkaline earth metals
lanthanides
11
The _____________ tells you how many electron shells an element will have.
family
atomic number
group number
period number
12
A non-neutral atom is called a(n)...
isomer
ion
covalent
isotope
13
Look at the element below. How many neutrons does the most common isotope have?
80
25
55
30
14
An ionic bond forms when...
Two atoms share a pair of electrons
One atom steals an electron from another
Two atoms with opposite charges are attracted to each other
Two atoms share an electron
15
Find Phosphorus in the Periodic Table below. How many valence electrons does it have?
3
15
5
31
16
How did Mendeleev organize his periodic table?
By atomic mass
By state
By atomic number
By color
17
In a neutral atom which two things are the same?
neutrons and electrons
protons and neutrons
electrons and protons
protons and atomic mass
18
You know the number of valence electrons an element has by its
group number
atomic mass
atomic number
period number
19
What does the atomic number tell you?
The charge on an atom
The number of neutrons in the atom
The mass of an atom
The number of protons in the atom
20
What tells you which elements share properties?
Same period
same groups
metals, non metals and noble gases
the number of protons
21
How is the modern periodic table organized?
By state
By atomic mass
By atomic number
By color
22
A covalent 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
23
The type of element best used to make a wire is a
noble gas
metal
metalloid
non-metal
24
Look at the element below. How many electrons does a neutral atom have?
30
25
80
55
25
The least reactive elements are...(think trends)
transition metals
lanthanides
non-metals
noble gases
26
The two main numbers in each square of the periodic table are the
atomic number and atomic mass
Atomic number and number of neutrons
Number of protons and number of neutrons
Number of isotopes and number of ions
27
In the compound Na
2
SO
4
, what is the ratio of Na:S?
1:1
1:2
2:4
2:1
28
Which family is most likely to form negative ions?
metalloids
noble gases
alkaline eath metals
halogens
29
Noble gases are reactive
True
False
30
What is the octet rule?
Atoms need to lose 8 e-
Atoms need 8 e- in their outer shell which can be shared
Atoms need 8 e- in their outer shell which can't be shared
Atoms need 8 e- total
31
The most reactive elements are(think trends)
lanthanides
transition metals
noble gases
alkali metals
32
Isotopes are versions of atoms with different....
electric charges
numbers of protons
numbers of neutrons
numbers of electrons
33
The least reactive elements are
transition metals
lanthanides
non-metals
noble gases
34
Group two has 4 valence electrons?
True
False
35
The definition of atomic radius is the measurement of the size of a netural atom.
False
True
36
Atoms of the same element may have different mass numbers.
True
False
37
How is a negative ion formed
Gaining Electrons
Losing Electrons
38
Which of the following correctly describes a solution?
A heterogeneous mixture of solutes and solvents
A solute dissolved in a solvent
A hetergenous mixture of solutes
A solvent dissolved in a solute
