BI 121 Exam 1 – GRCC questions with verified
answers
A liquid homogenous mixture of greater than, or equal to, 2 elements
Ans✓✓✓ Solution
A substance that cannot be broken down into other substances
(normally) Ans✓✓✓ Element
A variant form of an element
Contain a variant number of neutrons Ans✓✓✓ Isotope
An atom that has gained or lost an electron, therefore has a net
positive or negative charge Ans✓✓✓ Ion
An isotope with an unstable nucleus, decays and emits energy and
particles (negative and positive) Ans✓✓✓ Radioactive Isotope
(Radioisotope)
Anything that occupies space and has mass Ans✓✓✓ Matter
Atomic mass/weight
Sum of protons and neutrons Ans✓✓✓ Mass Number
, Atoms are reactive until they have 8 electrons in their valence shell; will
form chemical bonds until they reach 8 Ans✓✓✓ Octet Rule (Rule of
Eights)
Both atoms exert equal pull on the shared electrons Ans✓✓✓
Nonpolar Covalent Bonds
Chemicals being changed by a reaction
[Na + Cl] = NaCl Ans✓✓✓ Reactants
Chemicals produced by a reaction
Na + Cl = [NaCl] Ans✓✓✓ Products
Decomposition Reaction Ans✓✓✓ AB ---------> A +B
Electrolyte formed by the reaction of an acid and a base Ans✓✓✓ Salt
Electrolytes that accepts H+ ions Ans✓✓✓ Base (Alkali)
Electrolytes that releases H+ ions Ans✓✓✓ Acid
Electron pairs are shared Ans✓✓✓ Covalent Bonds
answers
A liquid homogenous mixture of greater than, or equal to, 2 elements
Ans✓✓✓ Solution
A substance that cannot be broken down into other substances
(normally) Ans✓✓✓ Element
A variant form of an element
Contain a variant number of neutrons Ans✓✓✓ Isotope
An atom that has gained or lost an electron, therefore has a net
positive or negative charge Ans✓✓✓ Ion
An isotope with an unstable nucleus, decays and emits energy and
particles (negative and positive) Ans✓✓✓ Radioactive Isotope
(Radioisotope)
Anything that occupies space and has mass Ans✓✓✓ Matter
Atomic mass/weight
Sum of protons and neutrons Ans✓✓✓ Mass Number
, Atoms are reactive until they have 8 electrons in their valence shell; will
form chemical bonds until they reach 8 Ans✓✓✓ Octet Rule (Rule of
Eights)
Both atoms exert equal pull on the shared electrons Ans✓✓✓
Nonpolar Covalent Bonds
Chemicals being changed by a reaction
[Na + Cl] = NaCl Ans✓✓✓ Reactants
Chemicals produced by a reaction
Na + Cl = [NaCl] Ans✓✓✓ Products
Decomposition Reaction Ans✓✓✓ AB ---------> A +B
Electrolyte formed by the reaction of an acid and a base Ans✓✓✓ Salt
Electrolytes that accepts H+ ions Ans✓✓✓ Base (Alkali)
Electrolytes that releases H+ ions Ans✓✓✓ Acid
Electron pairs are shared Ans✓✓✓ Covalent Bonds
