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insens350 [35]
4 years ago
11

PLEASE HELP ME :( It’s urgent!!!!!

Chemistry
1 answer:
MrRa [10]4 years ago
5 0

Answer:

C and D

Explanation:

In the first table, both element particles have more electrons than protons which is unusual and indicates they have a negative charge. Furthermore both numbers add up to full electron shells (2,8 and 2,8,8) meaning they are ions (charged particles formed to gain full valence shells and become stable), so it is C for the first question, negative ions.

As for the second one, isotopes like versions of the same element except with different numbers of neutrons, so they are still the same element but have different mass. As shown here the numbers indicate the number of neutrons therefore it is D, 3 more neutrons and no more electrons.

Hope this helped!

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This is mind numbing, but I got you.

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3 0
3 years ago
The formation of aluminum chloride can be described by the balanced chemical equation.
galina1969 [7]

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A titration was performed on 50.0mL of 0.250 M NaOH.After the
777dan777 [17]

Answer:

1.750 M

Explanation:

In case of titration , the following formula can be used -

M₁V₁ = M₂V₂

where ,

M₁ = concentration of acid ,

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M₂ = concentration of base,

V₂ = volume of base .

from , the question ,

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6 0
3 years ago
What is the smallest unit of matter that can retain the chemical properties of an element?
Sindrei [870]

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I Hope my answer help you :)

8 0
3 years ago
at what temperature in celsius would a gas have volume of 13.5 L at a pressure of 0.723 atm, if it had a volume of 17.8 L at a p
Alex

Answer:

initial temperature=-3.31^{\circ}C

Explanation:

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putting all the value we get:

T_2 =269.7K =-3.31 ^{\circ} C

initial temperature=-3.31^{\circ}C

6 0
3 years ago
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