Physical Science 1110 Checkup #2

electrolysis

In the process ___________ , an electric current breaks the chemical bond holding a compound together.

neutrons ... protons

Oxygen has eight protons in its nucleus; an isotope of oxygen may have more ________ in its nucleus, but it must have eight _______.

In an ordinary chemical reaction, the total mass of the reacting materials is equal to the total mass of the products.

State the law of conservation mass. __ __ ________ ________ _______, ___ _____ ____ __ ____ ________ _________ __ _____ __ ___ _____ ____ _ ___ _________.

mass

The ____ number of any atom is found by adding the number of protons to the number of neutrons in its nucleus.

f

The atomic number....... a) is an element's number on the periodic table b) is the number of protons in the nucleus of one of that element's atoms c) is the number of neutrons in the nucleus of one of that element's atoms d) is the number of electrons in one atom of that element if the element is a neutral one e. a, c, and d f. a, b, and d g. all the above

2...1...4

The formula for sulphuric acid, H2SO4, tells you that there are _ atoms of hydrogen, _ atom of sulphur, and _ atoms of oxygen in every molecule of sulphuric acid.

gold

What does this symbol stand for? Au

carbon

What does this symbol stand for? C

hydrogen

What does this symbol stand for? H

oxygen

What does this symbol stand for? O

lead

What does this symbol stand for? Pb

sulfur

What does this symbol stand for? S

zinc

What does this symbol stand for? Zn

molecule

a bonded collection of two or more atoms of the same or different elements

solution

a homogeneous combination with a uniform consistency whose components do not chemically combine in definite proportions

compound

a substance composed of two or more substances that uniformly combine in definite proportions

isotopes

atoms of the same element with different masses

atomic weight

the mass of a quantity of atoms compared to the mass of the same quantity of atoms of carbon-12

solute

the material being dissolved in a solution

solvent

the material in which another os dissolved in a solution

mass number

total number of particles within an atom's nucleus

c

"S" if it is true of a solution; "C" if it is true of a compound Can only be separated by chemical means

c

"S" if it is true of a solution; "C" if it is true of a compound Elements combine chemically

s

"S" if it is true of a solution; "C" if it is true of a compound Elements combine in different proportions

c

"S" if it is true of a solution; "C" if it is true of a compound Produces a new substance with unique qualities

s

"S" if it is true of a solution; "C" if it is true of a compound a solute in a solvent

s

"S" if it is true of a solution; "C" if it is true of a compound can be separated by physical means

c

"S" if it is true of a solution; "C" if it is true of a compound unaffected by physical conditions

molecule

A ________ is the smallest division of a compound; an atom is the smallest division of an element.

atomic mass unit

An amu is an ______ ____ ____ and is equal to 1/12 the mass of one carbon-12 atom.

single

Atoms of some elements are never found naturally as ______ atoms but as molecules of two or more atoms of the same element.