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miv72 [106K]
3 years ago
9

I just need the last one

Chemistry
1 answer:
Allisa [31]3 years ago
3 0
You can search all these questions up on the internet.
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What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass number of 39
zvonat [6]

Answer:

NO OF NEUTRON =MASS NO -ATOMIC NO

=39-19

=20

bcz atomic no is equal to no of electrons

mark as brainliest

7 0
3 years ago
Can I get Help with this question ‍♂️ please?
Sphinxa [80]

Answer:

Molar mass of the substance

4 0
3 years ago
Explain what is wrong with this statement: “The density of a heavy bar of pure gold is greater than the density of a small ingot
VladimirAG [237]

Answer:

Both densities would be equal.

Explanation:

since both the bar and the ingot are pure gold, they would have the same density, despite the amount.

5 0
3 years ago
Which of the following chemical symbols represents the element silver?
Virty [35]
The chemical symbol that represents the element silver is B. Ag
3 0
3 years ago
What did the Curies conclude about radioactivity based on their studies?
jenyasd209 [6]

Answer:

c

Explanation:

3 0
3 years ago
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