What statement is TRUE about the subatomic particles within an atom? a

Protons and electrons have the same mass.

b

Protons have a positive charge and are found in the nucleus.

c

Neutrons are negative and are found outside the nucleus.

d

Electrons are negative and are found in the nucleus.

The three subatomic particles in an atom are protons, neutrons, and electrons:

Protons have a relative mass of 1 and a charge of +1, and they are found in the nucleus of an atom.

Neutrons have a relative mass of 1 and no charge, and they are also found in the nucleus of an atom.

Electrons have a relative mass of 1/1836 and a charge of -1. They are found in specific orbits around the nucleus and are held in these orbits by the positive charge of the protons in the nucleus.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.