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Rom4ik [11]
3 years ago
7

How many core electrons does magnesium (Mg) have?

Chemistry
2 answers:
STatiana [176]3 years ago
6 0
Hence Mg has 10 core electrons and 2 valence electrons. The number of core electrons depends on the period (row) in which the element is found.
OLga [1]3 years ago
6 0

Answer:

10  

Explanation:

Mg is element No. 12.

It has 12 electrons, with a shell configuration of 2, 8, 2.

The last two electrons are the valence electrons; the remaining 10 electrons are the inner or core electrons.

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True or False
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Its 26. True

27 . False

Explanation:

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In the equation 2 H2 + O2 -> 2H2O, H2, O2, and H2O are all trace elements. Only H2O is a compound. Only H2 and O2 are compoun
stiks02 [169]

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Explanation:

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The winter solstice is the shortest day of the year in the northern hemisphere. Please select the best answer from the choices p
Natalka [10]

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Explanation:

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5 0
4 years ago
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What is the mass of 23450 L of hydrogen gas at STP
WINSTONCH [101]
Remember that in this case pressure is equal to 1.00 atm and temperature is equal to 273.15K. So,
P
V
=
n
R
T
→
n
=
P
V
R
T
=
1.00
a
t
m
⋅
7.0
L
0.082
a
t
m
⋅
L
m
o
l
⋅
K
⋅
273.15
K
=
0.31
Since we know hydrogen's molar mass (
2.0
g
m
o
l
), we can determine the mass
m
H
2
=
n
⋅
m
o
l
a
r
.
m
a
s
s
=
0.31
m
o
l
e
s
⋅
2.0
g
m
o
l
=
0.62

g
If indeed you are dealing with STP, remember that, under these conditions, 1 mole of any ideal gas occupies
22.4
L
. So,
n
=
V
V
m
o
l
a
r
=
7.0
L
22.4
L
=
0.31
moles
And, once again,
m
=
0.31
⋅
2.0
=
0.6
4 0
3 years ago
How are the environments of a desert and a tundra different?
Alexeev081 [22]

Answer:

A tundra is less humid than a desert

Explanation:

6 0
2 years ago
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