Answer: 2 atoms of MgO will be there on the product side.
Explanation: We are given an element Magnesium which is highly flammable and when reacted with oxygen will follow equation:
2 moles of magnesium solid reacts with 1 mole of oxygen gas to produce 2 moles of magnesium oxide solid which is white in color with the release of heat.
At the product side, 2 atoms of magnesium oxide will be present.
The number of atoms would expect to find on the product side of the reaction between Mg and O₂ is 4 atoms
<u><em> </em></u>Mg react with O₂ to produce MgO according to reaction below
2Mg +O₂ →2 MgO +heat
MgO is the product ,therefore the number of atoms in product side is
= 2 [ atoms of Mg + atoms of O]
= 2[ 1+1] = 4 atoms
Anions and cations have different atomic sizes than the neutral atoms.
When the bromine atom becomes an anion, it ______ in size.
Anions involves gaining extra electrons. This basically leads to increased repulsion between the electrons and thereby increasing the size. Anions are always larger than the neutral atoms.
This means the answer is A. Increase
When the strontium atom becomes a cation, it ______ in size.
Cations involves losing valence electrons. This basically leads to a decrease in electron shells and electron repulsion thereby reducing the size. Cations are always larger than the neutral atoms.
This means the answer is B. Decrease
SI, The International System of Units is a scientific method of expressing the magnitudes or quantities.
Hope this helps!