Atoms, elements, compound Flashcards
1
Q
Which is the smallest?
A - Molecule
B - Atom
C - Dust
A
B - Atom
2
Q
Is MG the correct symbol for magnesium?
A
No it’s Mg
3
Q
Is this statement correct? - Elements always exist as pairs of atoms called molecules.
A
Incorrect - Elements and compounds can exist as molecules.
4
Q
How many different atoms are there in a compound?
A
Two or more
5
Q
How many elements are there?
A
118
6
Q
Is water a compound?
A
Yes
7
Q
How many atoms are there in total in a molecule of sulfur trioxide, SO3?
A
Four
8
Q
Why does air not have a definite formula?
A
It is not a compound
