Use the portion of the periodic table shown below to answer the questions.

1 answer:

3 0

part 1 sodium and rubidium have the same properties with potassium. this is because sodium, potassium, and rubidium are in the same column that is they are all in group one of periodic table. all are alkali metals hence have the same properties.

part two
magnesium have  12 neutrons, 12 protons and 12 electrons
from periodic table the magnesium is atomic number 12 and has a mass number of 24.305
The atomic number is equal to number of protons that   is 12
protons value is the same as electron value hence the number of electron are also 12
mass number=protons +neutrons hence
Neutron=mass number-number of protons  that is 24.035-12=12 which is equal to 12 neutrons

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There's many resources on web that can assist you with this concept:

https://en.intl.chemicalaid.com/tools/equationbalancer.php

https://www.webqc.org/balance.php

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