Es
determine the approximate mass of the isotope of carbon in the image.
o amu
b)
6 amu
12 amu
d
18 amu

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

1 a

2 d

3 a

4 c

explanation:

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.