ACE Physical Science 1110 PACE Test

caused by the rotation of electrons as they orbit the nuclei of atoms.

Magnetism

___________ were discovered many years after the discovery of the other comonents of atoms because they carry ____________ and usually have ______________.

Neutrons, no charge, no effect on other objects

Which of the following symbols could represent an atom: Q, r, PH, Xept, Br

Q, Br

1/12 the mass of one carbon-12 atom

amu

the smallest particle of an element that still retain sits chemical and physical properties

atom

the number of protons, the number of electrons, or an element's number on aperiodic table

atomic number

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

atomic weight

C

carbon

the study of matter

chemistry

a heterogeneous combination in which particles of one substance are suspended in another

colloid

electrons, protons, neutrons

components of an atom

appear as a cloud around the nucleus of an atom

electrons

the simplest homogeneous substance

element

a susbstance in this pahse will expand to fill the container; if it is not contained, it will expand in every direction indefinitely

gas

Au

gold

a substance with regions of differing properties

heterogeneous

mixtures, colloids

heterogeneous substances

elements, solutions, compounds

homogeneous substances

H

hydrogen

atoms of the same element with different masses

isotopes

a substance in this pahase can be poured, will flow, and takes the shape of the container

liquid

the total number of particles within an atom's nucleus

mass number

a heterogeneous combination of substances that retain their individual properties and can be separated

mixture

a bonded collection of two or more atoms

molecule

N

nitrogen

O

oxygen

solid, liquid, gas, plasma

phases of matter

the study of energy

physics

The ionized matter in this phase is found on the sun and can conduct electricity

plasma

Nuetral atoms contain an identical number of __________ and _____________, but the number of _____________ may be different.

protons, electrons, ..... nuetrons

contained within an atom's nucleus

protons, neutrons

the molecules of the matter in this phase exert a strong attraction for each other and never move very far apart

solid

the material which is dissolved in a solution

solute

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

solution

the material in which another is dissolved in a solution

solvent

Zn

zinc