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kap26 [50]
2 years ago
11

What is the valence shell electronic configuration of Alkali Metals , Alkaline Earth Metals, Halogens and Noble Gases?

Chemistry
2 answers:
RideAnS [48]2 years ago
4 0

Answer:

Alkali Metals: 1 valence electron

Alkaline Earth metals: 2 valence electrons

Halogens: 7 Valence electron

Noble Gases: 8 Valence electrons

alisha [4.7K]2 years ago
3 0

Answer:

alkali metals: 1

alkaline earth metals: 2

Halogens: 7

noble gases : 8

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If a cross-country runner covers a distance of 347 meters in 134 seconds what is her speed?
Vlad1618 [11]
Distance s=347 meters
time t=134 sec.
speed =s/t=347/134=2.5896 m/s nearly
5 0
3 years ago
An object has a mass of 20 kg and a volume of 5 mL. What is the object's density?
e-lub [12.9K]
Good grief, this stuff got caught in a black hole somewhere. It is terribly dense.
1 mL = 1 cc under normal conditions.

d = mass / volume
m = 20 kg
v = 5 mL

d = 20kg / 5 mL
d = 4 kg / mL
d = 4 kg / cc

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7 0
3 years ago
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Consider the following reaction:
RUDIKE [14]

Answer:

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Explanation:

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3 years ago
A liquid is boiled in a beaker until all of the liquid has evaporated. a powdery substance remains in the beaker. which does thi
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The original liquid, was not a pure substance
4 0
2 years ago
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Consider the complete reaction of 43.0 g of silicon with excess nitrogen gas in the reaction shown below. What mass of product f
kupik [55]
The answer to your question is : no.of moles of Si = 43/atomic mass of Si = 43/28.1 = 1.53

according to reaction 3 moles of Si gives 1 mole of Si3N4

so 1.53 mole of Si will give 1.53/3 = 0.51 mole of Si3N4

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it means that 1 mole of Si3N4 = 140.28 g

so 0.51 mole of Si3N4 = 0.51 X 140.28 = 71.543 g
7 0
3 years ago
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