chemistry definitions

Question 1

nucleons

Answer 1

The term nucleon is used to designate both protons and neutrons in the nucleus . The mass number A is the total number of nucleons.

Question 2

solid shere/ billiard ball model

Answer 2

Model description:The Solid Sphere Model was the first atomic model and was developed by John Dalton in 1808. He hypothesized that an atom is a solid sphere that could not be divided into smaller particles. He came up with his theory as a result of his research into gasses. Scientist: John Dalton

Question 3

Polyatomic ion

Answer 3

As the name suggests, a polyatomic ion is a charged entity composed of several atoms bound together

Question 4

Stock system

Answer 4

a system in chemical nomenclature indicating the oxidation state of the significant element in a compound or ion by means of a Roman Numeral that is used in parentheses after the name

Question 5

isotope

Answer 5

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.

Question 6

ionic compounds

Answer 6

are compounds made up of ions that form charged particles when an atom (or group of atoms) gains or loses electrons .

Question 7

ionic bond

Answer 7

a chemical bond formed between oppositely charged species because of their mutual electrostatic attraction .

Question 8

molecular compound

Answer 8

consists of molecules whose formula represents the actual number of atoms bonded together in the molecule . The atoms are joined to give a definite shape which is defined by the angles between the bonds and by the bond lengths.

Question 9

molecular bond

Answer 9

or covalent bond, is formed when atoms bond by sharing pairs of electrons . This sharing can occur from atom to atom, or from an atom to another molecular bond.

Question 10

stable octet

Answer 10

A stable arrangement is attended when the atom is surrounded by eight electrons. This octet can be made up by its own electrons and some electrons which are shared. Thus, an atom continues to form bonds until an octet of electrons is made.

Question 11

billiard ball model

Answer 11

john dalton

Question 12

plum pudding model

Answer 12

J.J thompson

Question 13

solar system model

Answer 13

erenst rutherford

Question 14

bohr model

Answer 14

neils bohr

Question 15

electron cloud model

Answer 15

erwin schrodinger