yearly exam Flashcards
1
Q
a molecule is made up of how many elements
A
2 or more
2
Q
compound can react to form:
A
elememnts
3
Q
elements can react to form:
A
compounds
4
Q
a compound is made from at least:
A
2 or more elements
5
Q
chemical formula for salt
A
NaCl
6
Q
is a mixture forming a sign of chemical change?
A
no
7
Q
is a preciptate forming a sign of chemical change?
A
yes
8
Q
is a gas being given off a sign of chemical change?
A
ye
9
Q
what is a physical change
A
a change in state not structure.
10
Q
chemical change
A
a change in structure not state
11
Q
a non mettalic lattice can be formed with:
A
c (carbon) eg diamonds
12
Q
the atomic number is
A
on the bottom
13
Q
the possible mass # is the number
A
on top (rounded)
14
Q
of electrons is
A
on the bottom
15
Q
of neutrons is
A
mass (top)- atomic numbers(bottom)
