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valentina_108 [34]

3 years ago

11

Drawing atoms: Hi my sciecne teacher has been in buisness fro over 30 years so he doesn't explain anything. I remeber this being

quite simple so if anyone is willing to help please do.

1 answer:

tester [92]3 years ago

8 0

The mass is the protons+neutrons and the atomic number is just how many protons there are

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Name two elements that have properties similar to those of beryllium and have average atomic masses higher than 130

sertanlavr [38]

In the periodic table, elements of the same group are characterized by having the same similar properties.
So, first we will check the elements that lie within the same group as <span>beryllium and then we will attempt to choose the elements with atomic mass higher than 130.

So, elements in the same group as </span>beryllium are: magnesium, calcium, strontium, barium and radium.
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radium has atomic mass of 226 amu
barium has atomic mass of 137.327 amu

Based on this, the two elements would be barium and radium.

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$^1H\implies ^2H\implies ^3H$

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The answer is

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only carboxyl groups (=C=OO-</span>

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