1. we used <u>Symbol</u> to represent an element.
2. The chemical formula of a molecule shows the <u>number and kind of atoms contained in the molecule</u>.
3. K (potassium) is the atom among the given choices.
4. CO (carbon - monoxide) is the molecule among given choices.
Becoming an ion involves gaining or losing electrons
Electrons have a relative mass of 0
So adding or removing them doesn't change the mass of the atom
So the answer is (3) remains the same
The answer is Oxygen. The<span> elements that has the same lewis structure as sulfur is Oxygen. </span><span>This is due to the fact that although the two compounds have different electronic configurations, the two have the same arrangement of electrons in their outermost orbits. </span>
The oxidation number of iodine is 5 in Mg(IO3)2 which can be calculated as
Mg(IO3)2
MgI2O6
As we know that
Mg has +2
O has -2
So,
(+2) + 2I + 6 (-2)=0
2 + 2I - 12 =0
10+ 2I =0
10 = 2I
I =5
answer :<em> </em><u><em>need the purpose, a question to ask, you have to conduct background reasearh, an hypothesis, an experiment to conduct with a independent varable and a dependent variable, and your data and your analysis.</em></u>
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Explanation: i hope this helped and it's in my own words btw