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Q1:The following one about a nucleus of an atom:. A – electron B – Neutron C - proton. Q2:One of the following is one of the radioactive elements:. A – Magnesium B – uranium C - K. Q4:The symbol of zinc in the periodic table:. A- Na B- CO C- Zn.
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Q1:The following one about a nucleus of an atom: A – electron B – Neutron C - proton
Q2:One of the following is one of the radioactive elements: A – Magnesium B – uranium C - K
Q4:The symbol of zinc in the periodic table: A- Na B- CO C-Zn
Q5:That one of the following items represent the ion: A- He B-Na+1 C- AL