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denpristay [2]
3 years ago
9

1. What do the numbers 1-18 represent on a periodic table?​

Chemistry
1 answer:
Mashcka [7]3 years ago
4 0

Answer:

The number for the element group is cited above the top element of each column. The element group values are integers running from 1 to 18. Examples: Hydrogen belongs to element group 1. Beryllium is the first element in group 2.Explanation:

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4. Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number
densk [106]

no it is not possible, because they both have the same number of valence electrons in each element. in a compound you are supposed to have two or more elements that have different numbers of valence electrons so when put together they for a compound.

3 0
4 years ago
How many electrons in an atom with the atomic number of 45
Sergio039 [100]

Answer:

Number of Protons: 45

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Explanation:

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4 0
3 years ago
Answer plsssss I’m dumb
aev [14]

Answer:

bottom middle

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3 years ago
Why are isotopes with short half-lives not useful for dating very old rocks?
erma4kov [3.2K]

Answer:

The radioactive isotopes within these brains typically record the ages of the grains-not the time when the sedimentary rock was formed, making it difficult to date using radiometric dating. The half-life of U-235 is 704 million years.

Explanation:

hope this helps but if i'm wrong then i'm sorry..

4 0
3 years ago
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