Filipino 7-8
Kabuoang pangyayari
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Filipino 7-8 Kabuoang pangyayari
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Answer:
PROBLEM:
The following are elements except:
a.) carbon
b.) water
c.) magnesium
d.) water
ANSWER:
\large\underline{\boxed{\rm b)\:water\quad or\quad d)\:water}}
b)waterord)water
ELEMENTS
a pure substance that consists of only one type of atom; consisting only of atoms that all have the same numbers of protons in their atomic nuclei
example of which are Carbon (C) and Magnesium (Mg) in the problem; we have Nitrogen (N) as the most abundant gas element in the atmosphere
COMPOUND
it is formed by the chemical bonding of two or more elements; example of which is water, it is formed due to the chemical reaction between two atoms Hydrogen (H) and an Oxygen (O), the reason why we have \rm H_20H
2
0 as its chemical symbol
any substance composed of identical (the same) molecules consisting of atoms of two or more than two kinds of chemical elements