20 questions
Which of the following chemical formulas represents a compound?
C
O2
CH3CHO
H2
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a gas at room temperature.
made of two or more different elements.
given off by green plants.
What is the term for combining 2 or more SAME or DIFFERENT elements together?
atoms
elements
molecules
compounds
What is the term for combining 2 or more DIFFERENT elements together?
atoms
elements
molecules
compounds
Bonds between atoms in a molecule form as a result of the sharing of?
formulas
valence electrons
atoms
valence chemicals
A recipe for a chemical substance is called a _________________.
coefficent
chemical formula
compound
subscript
When a subscript or coefficient is NOT present what number is understood to be there?
0
1
2
3