Question

storyline 1 exam
select all the statements that best describe an atom.
is the smallest particle of an element that retains its identity in a chemical reaction
is the largest particle of an element that retains its identity in a chemical reaction
has no net charge and has a cloud surrounding a dense inner core
is exactly the same as every other atom and has the same properties
contains subatomic particles named the proton, neutron, and electron

Explanation:

• An atom is the smallest particle of an element that retains its identity in a chemical reaction.
• Atoms have no net charge (protons +, electrons -, neutrons neutral; \(+ - = 0\)). They have a cloud (electron cloud) surrounding a dense inner core (nucleus with protons and neutrons).
• Atoms contain subatomic particles: protons (positive), neutrons (neutral), and electrons (negative).
• Atoms of the same element can have isotopes (different neutron numbers, so not exactly the same as every other atom of the element in mass - related properties). And it's the smallest, not the largest, particle of an element retaining identity in a chemical reaction.

Answer:

• is the smallest particle of an element that retains its identity in a chemical reaction
• has no net charge and has a cloud surrounding a dense inner core
• contains subatomic particles named the proton, neutron, and electron