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inna [77]
3 years ago
15

Select the number of electrons each atom must gain or lose to have a full valence level. Use the periodic table if you need help

. A calcium atom (Ca) will ___ A fluorine atom (F) will ___ A lithium atom (Li) will ___ An argon atom (Ar) will ___ An aluminum atom (Al) will ___
Chemistry
2 answers:
Lady bird [3.3K]3 years ago
8 0
Calcium will loose one electron. Fluorine will gain one electron. Lithium will loose one electron. Argon will not loose any because it already has a full valence level. Aluminium will loose 3 electrons.
laiz [17]3 years ago
8 0

The CORRECT answers are: lose 2, gain1, lose1, not form an ion, lose 3

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A large activation energy is required to break the double bonds of unsaturated hydrocarbons.
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5 0
3 years ago
5. The volume of a sample of helium is 4.50 L at 20.0°C and 203.0 kPa. What will its volume be
serg [7]

The volume will be 2.25 L.

<u>Explanation:</u>

As per Charle's law, the volume of a gaseous system is directly proportional to the temperature provided the system is at constant pressure. Since volume of gas is directly proportional to the temperature of the gas molecules, V∝ T

So, in case there is a change in temperature with constant pressure, then there will be equal change in volume.

\frac{V_{1}}{V_{2}  } = \frac{T_{1}}{T_{2}  }

Thus, here V_{1} = 4.50 L , T_{1}= 20 °C and P_{1} = P_{2} = 203 k Pa , T_{2} = 10°C.

Since, volume and temperature is directly proportional then there will be increase in volume with increase in temperature and vice versa.

\frac{4.50}{V_{2} } = \frac{20}{10}

V_{2} = \frac{4.50*10}{20} = 2.25 L

So, the new volume is 2.25 L.

5 0
4 years ago
How do you spell hard water with 3 letters?
stiv31 [10]
The answer is ice. Nice brain teaser!

6 0
4 years ago
A calorimeter is filled with 250.0 g of water at 24.6oC. A 60.0 g sample of a metal at 100.0 oC is dropped in this calorimeter a
ehidna [41]
Answer : The specific heat of metal in this case will be 0.411 J/<span>g°C

Explanation : Specific heat can be calculated by using the formula 
Q = Cm</span>ΔT

where Q is heat added which is 100 here
C is specific heat which needs to be found
m is mass of the metal
and ΔT is the temperature change

on substituting we get,

100 =  x . 60 . 4.05

so, x = 0.411 
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3 years ago
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Mademuasel [1]

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3 years ago
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