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love history [14]
3 years ago
13

A sodium atom has 1 valence electron in its third shell. What will it do when forming an ion? A. gain 1 valence electron B. lose

1 valence electron C. gain 7 valence electrons D. lose 7 valence electrons
Chemistry
1 answer:
mote1985 [20]3 years ago
7 0

When forming an ion, this sodium atom will lose 1 electron, as it is the easiest way to form a full shell, as opposed to gaining 7 electrons.

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Can swords shatter from cold temperatures
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What is the chemical formula of sodium azide?
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2 years ago
It took 55 days for a radioactivity of 1.75 x 1012 Bq to remain 0.135 Ci. What is the half-life of this radioactivity?
Mnenie [13.5K]

From the calculations, the half life of the material is 6.5 days.

<h3>What is radioactivity?</h3>

The term radioactivity has to do with the spontaneous disintegration of a specie.

Uisng the formula;

N=Noe^-kt

N= amount at time t = 0.135 Ci or 4.995 ×10^9 Bq

No = amount initially present =  1.75 x 10^12 Bq

k = rate constant = ?

t = time taken = 55 days

Hence;

4.995 ×10^9  = 1.75 x 10^12e^-55k

4.995 ×10^9/1.75 x 10^12 = e^-55k

2.85 * 10^-3 = e^-55k

ln2.85 * 10^-3 = -55k

k = ln2.85 * 10^-3/-55

k = 0.1066 day-1

Half life = 0.693/ 0.1066 day-1

= 6.5 days

Learn more about radioactivity:brainly.com/question/1770619

#SPJ1

4 0
1 year ago
As student used a pen to draw a line across a piece of chromatography paper. he then placed a sample of dye on the drawn line fo
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Answer is in the photo. I can only upload it to a file hosting service. link below!

tinyurl.com/wpazsebu

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What happens if you try to move the atoms very close to each other?
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