Chemistry Midterm 2016

density is calculated by dividing

starting substance in a chemical reaction

iron

process in which substances are changed into different substances

one-twelfth the mass of a carbon atom having six protons and six neutrons

closeness of a measurement to its true value is a measure of its

the study of chemicals that, in general, do not contain carbon

describes mixture with a uniform composition

the study of the processes that take place in living organisms

which following category includes majority of the elements

the central part of an atom, containing protons and neutrons

Which of the following are considered physical properties of a substance?

the weighted average of the masses of the isotopes of an element

the study of all chemicals containing carbon

the total number of protons & neutrons in the nucleus of an atom

if a nail is ground into powder, its mass

substance that cannot be changed into simpler substances by chemical means

atoms with the same # of protons but different #'s of neutrons in the nucleus of an atom

not uniform in composition

gaseous state of substance that is a liquid or solid at room temperature

The variable that is observed during an experiment is called what type of variable?

a subatomic particle with no charge

periodic table arranged in order of increasing atomic

a physical blend of two or more components

a negatively charged subatomic particle

the number of protons in the nucleus of an element

substance that can be separated into two or more substances only by chemical change

which is nonmetal

concerned with the mechanism, rate, & energy transfer that occurs when matter undergoes change

composed of two or more substances chemically combined in a fixed proportion

which of the following is a heterogeneous mixture?

amount of matter an object contains

density of object, mass is 8.0g, volume is 25cm³

a substance formed in a chemical reaction

the smallest particle of an element that retains the properties of that element

a positively charged subatomic particle

particles found in nucleus of an atom

all atoms of the same element have the same

part of a sample having uniform composition and properties

a theory is.....?

separating a solid from a liquid by evaporating the liquid is called

5008 in scientific notation

color of visible light that has shortest wave length

which step in the scientific method requires you to use your senses to obtain information

lived from 460 B.C.-370B.C., among the first to suggest the idea of atoms

what is the next atomic orbital in 1s,2s,2p,3s,3p

process in which a liquid is boiled to produce vapor that is condensed again into a liquid

advantage of metric system

the study of the composition of matter

electron configuration of Potassium