Question

What is atom and molecule ? what is order of magnitude of mass of ine atom ?what are isotopes ?

Answer 1

Explanation:

Atom is the smallest component of an element, characterized by a sharing of the chemical properties of the element and a nucleus with neutrons, protons and electrons.

Molecule is a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

The gram (10−3 kg) is an SI derived unit of mass. However, the names of all SI mass units are based on gram, rather than on kilogram; thus 103 kg is a megagram (106 g), not a "kilokilogram". The tonne (t) is a SI-compatible unit of mass equal to a megagram, or 103 kg..

Isotopes:

Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

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Answer 2

Answer:

an atom is the smallest particle that can exist , they basically make up everything , and a molecule is a group of atoms chemically bonded.  i'm not sure what order of magnitude of mass of one atom is ( sorry ) . isotopes are hard to explain but let me break it down for you.  

Explanation:

we said that atoms are the smallest particle , but atoms are made up of 3 things . they call these subatomic particles , they are protons ( has a positive charge - and found in the nucleus ) , neutrons ( doesn't have a charge but is also found in the nucleus ) and electrons ( has a negative charge but is found on the outer shells ) . every element has a specific proton number , and the electron number is equal to that number so the atom stays neutral , but the neutron number can change . the defenition of isotopes is , atoms of the same element with the same proton number but different neutron numbers .

i know this seems complicated , if you are still confused please don't hesiate to ask me any questions ( i'm new to this site , i'm not sure if you can lol ) . hope this helps xoxo