Atomic Concepts
Periodic Table
Structure
Matter
Misc
100

The mass of each proton and each neutron is approximately equal to

(1) 1 g (3) 1 u (2) 1 mL (4) 1 mol

1 u

100

4 The elements on the Periodic Table of the Elements are arranged in order of increasing

(1) atomic mass   (2) atomic number

(3) mass number  (4) oxidation state

  (2) atomic number

100

Which type of chemical formula shows the arrangement of the atoms in a molecule? (1) empirical formula (3) molecular formula (2) general formula (4) structural formula

(4) structural formula

100

All matter can be classified as

(1) an element     

(2) a compound

(3) a mixture or an element

(4) a mixture or a substance

(4) a mixture or a substance

100

he concentration of which ion is increased when LiOH is dissolved in water?

(1) hydroxide ion (3) hydronium ion

(2) hydrogen ion (4) halide ion

(1) hydroxide ion

200

Which particles are found in the nucleus of an argon atom?

(1) protons and electrons

(2) protons and neutrons

(3) protons and neutrons

(4) positrons and electrons

(3) protons and neutrons

200

Which statement explains why a xenon atom is electrically neutral?

(1) The atom has fewer neutrons than electrons.

(2) The atom has more protons than electrons.

(3) The atom has the same number of neutrons and electrons.

(4) The atom has the same number of protons and electrons.

(4) The atom has the same number of protons and electrons.

200

Graphite and diamond are two forms of the same element in the solid phase that differ in their

(1) atomic numbers

(2) crystal structures

(3) electronegativities

(4) empirical formulas

(2) crystal structures

200

Which process is a chemical change?

(1) condensation of H2O(g)

(2) synthesis of MgO(s)

(3) evaporation of  C2H5OH(l)

(4) sublimation of CO2(s)

(2) synthesis of MgO(s)

200

Which period contains the greatest number of metals?

1) 1 3) 3

2) 2 4) 4

4) 4

300

How many electrons are shared in a triple bond between two atoms?

 (1)  6  (2)  2  (3)  3  (4) 4

(1) 6
300

If two atoms are isotopes of the same element, the atoms must have

(1) the same number of protons and the same number of neutrons

(2) the same number of protons and a different number of neutrons

(3) a different number of protons and the same number of neutrons

(4) a different number of protons and a different number of neutrons

(2) the same number of protons and a different number of neutrons

300

Carbon monoxide and carbon dioxide have

(1) the same chemical properties and the same physical properties

(2) the same chemical properties and different physical properties

(3) different chemical properties and the same physical properties

(4) different chemical properties and different physical properties

(4) different chemical properties and different physical properties

300

Which property is determined by the structure, arrangement, and interactions of the molecules of a substance at a given temperature and pressure?

(1) atomic radius     (3) formula mass

(2) half-life              (4) physical state

(4) physical state

300

Which particle has the least mass?

(1) alpha particle (3) neutron

(2) beta particle (4) proton

(2) beta particle

400

Krypton atoms in the ground state tend  not to bond with other atoms because their

(1) second electron shell contains eight electrons

(2) third electron shell contains eighteen electrons

(3) innermost electron shell contains two electrons

(4) outermost electron shell contains eight electrons

(4) outermost electron shell contains eight electrons

400

The weighted average of the atomic masses of the naturally occurring isotopes of an element is the

(1) atomic mass of the element

(2) atomic number of the element

(3) mass number of each isotope

(4) formula mass of each isotope

(1) atomic mass of the element

400

Which formula can represent an alkyne?

(1) C2H4      (3) C3H4

(2) C2H6      (4) C3H6

(3) C3H4

400

Which element must be present in an organic compound?

(1) carbon   (2) sulfur  (3) nitrogen  (4) oxygen

(1) carbon

400

The energy released during a nuclear reaction is a result of

(1) breaking chemical bonds

(2) forming chemical bonds

(3) mass being converted to energy

(4) energy being converted to mass

(3) mass being converted to energy

500

The mass of an electron is

(1) equal to the mass of a proton

(2) equal to the mass of a neutron

(3)  greater than the mass of a proton

(4)  less than the mass of a neutron

(4)  less than the mass of a neutron

500

Which statement describes a chemical property of iron? 

(1) Iron oxidizes.

(2) Iron is a solid at STP.

(3) Iron melts.

(4) Iron is attracted to a magnet.

(1) Iron oxidizes.

500

Which equation represents an addition reaction?

(1) C3H8  +  Cl2 → C3H7Cl    +  HCl

(2) C3H6  + Cl2 → C3H6Cl2

Which equation represents an addition reaction?

(1) C3H8  +  Cl2 → C3H7Cl    +  HCl

(2) C3H6  + Cl2 → C3H6Cl2

(3) CaCl2  +  Na2CO3 → CaCO3 + 2NaCl

(4) CaCO3 → CaO + CO2

(3) CaCl2  +  Na2CO3 → CaCO3 + 2NaCl

(4) CaCO3 → CaO + CO2

(2) C3H6  + Cl2 → C3H6Cl2

500

Which term describes an acid according to one acid-base theory?

(1) H+ acceptor

(2) H+ donor

(3) H2 acceptor

(4) H2 donor

(2) H+ donor

500

What is the approximate mass of an atom that contains 26 protons, 26 electrons and 19 neutrons?

(1) 26 u       (3) 52 u

(2) 45 u       (4) 71 u

(2) 45 u