What happens if an atom loses a neutron?
Its mass is lowered, but it is still the same element
Its mass is lowered, and it becomes a different element.
Its mass stays the same, and it is still the same element
Its mass stays the same, and it becomes a different element

"Its mass stays the same, and it becomes a different element" happens if an atom loses a neutron.

Option: D

Explanation:

Neutrons have a neutral charge, and are component of the nucleus, which means they contribute mass / weight ultimately to the atom. If you were to remove one of these, It would be the same aspect. Elements are clearly described by their protons and not by neutrons.

Neutrons do not carry an electrical charge and adding or removing it from the nucleus does not alter the nucleus' electrical charge. However it affects the nucleus mass. This isotopes are produced is the addition of or removal of neutrons from the nucleus.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.