1 answer:
1. B. Calcium is a chemical element that can be found as Ca on the periodic table.
2 A. Heterogeneous mixture. Pizza is not uniform and is a variation of cheese, bread, and toppings that aren't mixed completely together.
3. B. Carbon Monoxide, or CO, is a chemical compound, a combination of 2 or more chemical elements.
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Its total charge is zero but for the elements:
Sn===> Sn4+ positive
Cl===> Cl- negative
Answer:
helium
Explanation:
By losing an electron, they look like the noble gas that immediately precedes them on the periodic table.
Answer:
The answer is 7 (seven)
Explanation:
Fluorine has seven of eight possible electrons in its outermost energy level, which is energy level II.
What is the total number of electrons needed to completely fill all of the orbitals in an atoms second principal energy level
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