Answer:
Characteristics of Group
Explanation:
The elements of a group show similar chemical properties but there is a gradual variation in the physical properties of the elements in a group.
Answer:
Sulfur is the only element that can be identified as having 16 protons nothing more and nothing less
The compounds that have covalent bonding as their dominant bonding scheme are diamond and silica.
A covalent bond is formed between two nonmetals. Usually, when two nonmetals combine, electrons are shared between the two atoms involved in the bond.
Now, the solids diamond and silica are predominantly covalent solids. The atoms that combine in diamond are carbon atoms(nonmetals) while the atoms that combine in silica are silicon and oxygen (nonmetals also)
Hence, diamond and silica both have covalent bonding as their dominant bonding scheme.
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Answer:
Lisa sold 75 boxes of cookies all together
Explanation:
The 1st week she sold 18 boxes of cookies
The 2nd week she sold 18 of cookies
The 3rd week she sold 12 boxes of cookies
The 4th week she sold 12 boxes of cookies
The 5th week she sold 15 boxes of cookies
So, number of cookies sold altogether is 18+18+12+12+15= 75
The chemical formula of nitrogen dioxide is NO2. It is a brown coloured gas.
