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7A 7.3 Chemical Formulae of Molecular Elements a ...
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A molecule which is made up of atoms from different elements is called …………………
compound
A water molecule is made up of ………. oxygen atom and ……….. hydrogen atoms.
1, 2
A________________ is made up of two or more atoms chemically combined together.
molecule
The atoms that form a molecule are either from the same ………………… or from different elements .
element
An oxygen molecule is made up of ………… oxygen atoms.
two
How many types of atoms and the total number of atoms are present in an ozone molecule?
1 type of atom, 3 atoms in total
One molecule of the compound carbon tetrachloride consists of one carbon atom and four chlorine atoms chemically combined. What is its chemical formula?
CCl4
The ____________________  of a molecule shows the numbers and types of atoms it contains.
chemical formula
Which of the following chemical formulas contains the most total number of atoms?
 
C3H8
 
CO
 
H2O
 
CO2
Which of the following chemical formulas contains the most types of atoms?
 
NaHCO3
 
CO
 
H2O
 
C6H12O6
Which of the answers below would be a correct chemical symbol of an element?
 
Be
 
BE
 
be
 
bE
What is the number in a chemical formula that tells you how many atoms of an element are there in a molecule called?
Subscript
How many atoms are there in this molecule?
21
How many types of atoms are there in this molecule?
3
How many atoms are there in this molecule?
7
How many types of atoms are there in this molecule?
3
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