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Alchen [17]
4 years ago
7

What does light do in the photoelectric effect?

Chemistry
1 answer:
Trava [24]4 years ago
4 0

Answer:

it's B: light knocks electrons off metal atoms

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What is the formula of the ionic compound expected to form between the elements f and ca?
kow [346]

Ionic compounds are compounds made up of elements in which one has the tendency to loose electrons whereas the other has the tendency to gain electrons. Loss of electron results in the formation of a positively charged ion (cation) while gain of electrons results in the formation of negatively charged ions (anions). Usually metals have the tendency to loose electrons and non-metals tend to gain electrons.

Calcium (Ca) is a metal and belongs to group IIA in the periodic table with a valence electron configuration of 4s2

Fluorine (F) is a non-metal and belongs to group VIIA in the periodic table with a valence configuration of 2s22p5.

Thus, Ca will donate its outer 2 electrons to F, thus allowing each of the electronegative F atoms to complete its octet.

Therefore, we have:

Ca2+   +    F-        ------   CaF2

5 0
3 years ago
Which characteristics from the list below cause terrestrial planets to be more likely to have life than Jovian planets?
ddd [48]

Answer:

the Mercury planet is likely to have life but the earth as a lot of oxygen

6 0
3 years ago
Li + H2O + LiOH + H2<br> How do I balance this?
umka2103 [35]

Answer:

2Li + 2H2O → 2LiOH + H2

Explanation:

Lithium + Water = Lithium Hydroxide + Dihydrogen

6 0
3 years ago
What is the distance if traveling 6.5 m/s for 25 seconds
Nesterboy [21]

Explanation:

In this problem, we are given a conversion factor.

6.5 m=1s

So, since we know this, we can simply multiply 25 by 6.5 to see what the distance will be.

25 * 6.5 = 162.5

So, the distance traveled for 25 seconds is 162.5 miles.

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What is the formula for pentasilicon hexabromide ?
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Pentasilicon hexabromide
Si₅Br₆
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