Chemistry Exam 1

Chemistry is the study of ______ and the ______ it undergoes

matter; changes

The smallest building black of an element are called ______, and a combination of two or more of these connected together form ________.

atoms; molecules

Which of the following is not a homogeneous mixture?

A. Ham sandwich

B. Sodium chloride completely dissolved in water

C. Air

D. gasoline

E. milk

ham sandwich

list the three common states of matter

solid, liquid, gas

____ is the capacity to do work, and energy of motion is called _______

energy; kinetic

The type of chemical formula that gives the atoms present, the number of atoms, and how the atoms are connected is called the _______ formula

structural

The SI unit for volume is the

meters cubed

a property that depends on size is called _____

extensive

who conducted the “oil-drop” experiment?

Robert Millikan

Rutherford determined that most of the mass of the atom is in the _____ which contained the positively charged subatomic particles called ______

nucleus; protons

The discovery of radioactivity is credited to ____________________. Several radioactive elements and their properties were discovered by the ______ family

Henri Becquerel; Curie

What are the three classifications of elements?

metals, nonmetals, metalloids

The person who is given credit for the discovery of the nucleus of the atom is?

Rutherford

The change from ice to liquid water is an example of a chemical or physical change?

physical

solid to liquid is

melting

liquid to solid is

freezing

liquid to gas is

vaporization

gas to liquid is

condensing

The SI unit for time is

seconds

Energy that is stored is called ______ energy

potential

who came up with the atomic theory?

John Dalton

Who characterized electrons’ charge to mass ratio?

JJ Thomson

Who characterized neutrons?

James Chadwick