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madreJ [45]
3 years ago
10

Elements in group 1A all:

Chemistry
1 answer:
My name is Ann [436]3 years ago
8 0

Answer:

The answer to your question is below

Explanation:

Elements in group 1A all:

a. gain 1 electron   This option is wrong, elements in group 1A loses one electron.

<u>b. lose 1 electron  </u><u>This option is right.</u>

c. are non-metals  This option is incorrect, elements in group IA, are metals.

d. have 2 energy levels This option is incorrect, only one element in each group has 2 energy levels.

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Which part of the energy profile of a chemical reaction that goes to completion is typically the highest in energy? A. The activ
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4 0
3 years ago
Please help me with chemistry
vodka [1.7K]

Table Giving Answer

Element Atomic mass % Amount

Mg_24     24                79    18.96

Mg_25 25                10    2.5

Mg_26 26                11   2.86

   

Total                     24.32

Discussion

The method of calculation for this table, which was done in Excel (a spread sheet) is shown below. Assume that there is 100 grams of material of "pure" magnesium. What is it's mass?

<em><u>Sample  Calculation</u></em>

The the sample atomic mass = 24

Mass = % * sample atomic mass

Mass = 79% * 24

Mass = (79/100) * 24

Mass = 18.96

<em><u>Note</u></em>

The other two elements are found exactly the same as the sample calculation.

Then all you do is add the 3 masses together.

Answer

The mass of Mg to 1 decimal place is 24.3 <<<< Answer.


7 0
3 years ago
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