The answer is “Family”
Explanation- There are 18 numbered groups in the periodic table. The elements in a group have similar physical or chemical characteristics and some groups have a specific name, for example group 17 (the halogens).
Answer:
d.
Explanation:
all because the projector is a lens and the magnifying also the microscope
Yes a kg of hydrogen will have more atoms than a kg of lead, because lead has a higher atomic mass, than hydrogen so it will take more atoms of hydrogen to make a kg than lead
The frictional force is in the opposite direction
She is traveling at a constant speed.
