問題一覧
1
An example of an extensive property of matter is
mass
2
All of the following are physical properties of matter except
Ability to rust
3
Which state of matter takes both the shape and volume of its container
gass
4
Which state of matter is characterized by having an a definite shape, but in a definite volume
Liquid
5
Which state of matter is characterized by having an a definite shape and in a definite volume
solid
6
Which of the following is a physical change?
Evaporation
7
Which of the following processes does not involve a change in chemical properties?
Boiling
8
The study of the processes that take place in organisms
Biochemistry
9
Which of the following measurements contains two significant figures
0.000 44L
10
How many significant figures are in the measurements is 0.0034 KG
Two
11
How many significant figures are in the measurement 8110 40 g
Five
12
Express the sum of 1111KM and 222 KM using the correct number of significant digits
1333KM
13
Is breast the sum of 7.6 AM and 5.0 M using the correct number of significant digits
12.7 M
14
What is the measurement 111.009 MM rounded off to four significant digits
111.0 MM
15
The smallest particle of an element that retains the properties of that element is a
Atom
16
All atoms are
Neural with the number of protons equally the number of electrons
17
The atomic number of an element is the total number of which particles in the nucleus
Protons
18
An element has an atomic number of 76 atomic number of protons and electrons in a natural atom of electrons are
76. Protons and 76 electrons.
19
The sum of the protons and neutrons in an atom equals the
Mass number
20
What does the number 84 in the name krypton 84 represents
The mass number
21
All atoms of the same elements have the same
Number of protons
22
Isotopes of the same element have different
Numbers of neutrons
23
Isotopes of the same elements have different
Mass numbers
24
The mass number of an element is equal to
The total number of protons and neutrons in the nucleus
25
Using the periodic table, determine the number of neutrons in 16 O
8
26
How many protons electrons and neutrons does an atom with atomic number 50 and mass number 125 contain
50 protons 50 electrons 75 neutrons
27
Which of the following isotopes have the same number of neutrons and phosphorus 31
32/16 S
28
How many energy sub levels are in the second principal energy level
2
29
Where is the maximum number of elf orbitals in any single energy level in an atom?
7
30
Where is the maximum number of The orbitals and the principal energy level
5
31
Where is the maximum number of orbitals in the P sub level?
3
32
Where is the maximum number of electrons in the second principle energy level?
8
33
Where is the number of electrons in the outermost energy level of an oxygen atom?
6
34
How many Unpaired electrons are in a sulfur at at number 16
2
35
Which of the following elements Is in the same Period as phosphorus
Magnesium
36
Each period in the periodic table correspondence to
A principal energy level
37
The modern periodic table is arranged in order of increasing Atomic
number
38
Who arranged the element according to the atomic mass, used arrangements to predict the properties of missing elements
Dimitri Mendeleev
39
Of The elements PT, V, LINKR, which is a nonmetal
KR
40
To what category of elements does an element belong if it is a poor connector of electricity
Nonmetals
41
What is the charge of a cation
A positive charge
42
The metals and groups one, two, and 13
Lose electrons when they form ions
43
How many Phoenix electrons are in an atom of phosphorus?
5
44
How many valence electrons are in an atom of magnesium
2
45
How many valence electrons does a helium atom have?
2
46
How many valence electron are in in silicone atom?
4
47
What is the name given to the electrons in the highest occupied energy level of an atom?
Valence electron
48
How does calcium obey the octet rule reacting to form compound
it gives up electrons
49
Where is the charge on the strontium ion it
2+
50
How many electrons does barium have to give up to achieve a noble gas electron configuration?
3
51
How many electrons does nitrogen gain in order to achieve a noble gas electron configuration?
3
52
What is the formula for sodium sulfate?
Na2So4
53
What is the formula for potassium sulfide?
K2S
54
Which of the following compounds has the formula KN03?
Potassium nitrate
55
And ionic bond is a bond between
A caution and an anion
56
Which of these elements does not exist as a atomic molecule
Ne
57
Why do atoms share electrons in covalent bonds?
To attain a nova, gas electrons configuration
58
Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in dynamic oxygen molecule?
Unshared pair
59
What type of ions have names ending ide
only anions
60
When group 2 elements forms ions they
lose two electrons
61
Aluminum is a group 3 metal which ions does a typically form
Al3+
62
What is the formula for phosphoric acid?
H3PO4
63
Chemical reactions
Produce new substance
64
Which of the following is the correct name for N2O5
dinitrogen pentoxide