The element symbol for tungsten is _____

A) Tn

B) Tu

C) Ts

D) W

E) Te

D) W

What is the element symbol for aluminum?

A) Au

B) Am

C) Al

D) A

E) An

C) Al

What is the element symbol for manganese?

A) Ma

B) Mn

C) Mg

D) Me

E) M

B) Mn

The element symbol for lead is __.

A) La

B) Le

C) Sb

D) Lu

E) Pb

E) Pb

The symbol Cr represents the element _____

A) cerium

B) californium

C) curium

D) chromium

E) copernicium

D) chromium

The symbol Hg represents the element _____

A) hydrogen

B) mercury

C) helium

D) holmium

E) seaborgium

B) mercury

What element has the symbol Ag?

A) argon

B) silver

C) gold

D) arsenic

E) astatine

B) silver

What element has the symbol Br?

A) barium

B) bismuth

C) bohrium

D) bromine

E) boron

D) bromine

What element has the symbol F?

A) flourine

B) fluorine

C) phosphorus

D) flerovium

E) florine

B) fluorine

A common laser relies on a mixture of He and Ne. What elements do these symbols represent?

A) hafnium; neon

B) hydrogen; nitrogen

C) helium; nitrogen

D) hydrogen; neon

E) helium; neon

E) helium; neon

Transistors are made from Si, but in the past, were made from Ge. What elements do these symbols represent?

A) silver; germanium

B) silicon; germanium

C) silicon; gallium

D) tin; germanium

E) silver; gallium+

B) silicon; germanium

Which of the following sets of elements and symbols is a correct match?

A) niobium, Ni

B) platinum, Pm

C) rhenium, Rh

D) palladium, Pa

E) molybdenum, Mo

E) molybdenum, Mo

Which of the following sets of elements and symbols is not a correct match?

A) nitrogen, Ni

B) fluorine, F

C) chlorine, Cl

D) phosphorus, P

E) silicon, Si

A) nitrogen, Ni

Which scientist developed the nuclear model of the atom?

A) John Dalton

B) J. J. Thomson

C) Robert Millikan

D) Ernest Rutherford

E) James Chadwick

D) Ernest Rutherford

Rutherford's gold foil experiment determined that

A) neutrons are in the nucleus.

B) electrons have a negative charge.

C) most of the space in an atom is empty except for a concentrated area called the nucleus.

D) protons and neutrons have about the same mass.

E) neutrons have no charge.

C) most of the space in an atom is empty except for a concentrated area called the nucleus.

Which is not one of Dalton's hypotheses of atomic theory?

A) Elements are composed of atoms.

B) Compounds are composed of atoms of more than one element.

C) A chemical reaction involves the rearrangement of atoms.

D) All atoms of a given element are identical.

E) The atoms of one element are the same as atoms of another element.

E) The atoms of one element are the same as atoms of another element.

Which postulate(s) of Dalton's atomic theory of matter is/are NOT true?

A) Atoms of a given element are identical

B) Atoms are indestructible

C) Atoms combine in simple ratios to form compounds

D) Both (A) and (B)

D) Both (A) and (B)

Ignoring the sign, which has a greater magnitude of charge?

A) Electron

B) Proton

C) They have equal charges

D) Not enough information

C) They have equal charges

The nucleus of an atom contains:

A) Protons and electrons

B) Protons and neutrons

C) Electrons and neutrons

D) Protons, neutrons and electrons

E) Electrons only

B) Protons and neutrons

Which has a greater mass?

A) Electron

B) Proton

C) They have equal masses

D) Not enough information

B) Proton

Which particle(s) may be found in the nucleus of an atom?

A) Proton and electron

B) Proton and neutron

C) Proton only

D) Neutron only

E) Neutron and electron

B) Proton and neutron

Which two particles of the atom have nearly identical masses?

A) Proton and electron

B) Proton and neutron

C) Neutron and electron

D) No two particles have similar masses

B) Proton and neutron

The net charge on an atom of a given element changes as ______ are added or removed.

A) neutrons

B) protons

C) electrons

D) protons and electrons

C) electrons

What fundamental force is responsible for holding together the subatomic particles of an atomic nucleus?

A) Gravity

B) Electromagnetism

C) Weak nuclear force

D) Strong nuclear force+

D) Strong nuclear force

A mass spectrometer measures neon to have two masses: 20 and 22 atomic mass units. These are:

A) Isotopes

B) Ions

C) Compounds

D) None of the above

A) Isotopes

What does the mass number of an atom represent?

A) number of neutrons in the atom

B) number of protons in the atom

C) atomic mass of the element

D) total number of electrons and neutrons in the atom

E) total number of protons and neutrons in the atom+

E) total number of protons and neutrons in the atom

Which of the following pairs represent isotopes?

A) ²⁸Si and ²⁸Si⁴⁺

B) ²⁸Si and ²⁸Al

C) ²⁸Si and ²⁹Si

D) ²⁸Si and ²⁸Si⁴⁻

E) ²⁸Si⁴⁺ and ²⁸Al³⁺

C) ²⁸Si and ²⁹Si

Neutral atoms of all isotopes of a given element have the same

A) number of protons and neutrons

B) number of neutrons

C) number of electrons

D) mass numbers

E) masses

C) number of electrons

What element with a mass number of 100 has 56 neutrons in its nucleus?

A) Fermium (Fm)

B) Ruthenium (Ru)

C) Barium (Ba)

D) Copernicium (Cn)

E) Radium (Ra)

B) Ruthenium (Ru)

Which of the following would be an isotope of ¹⁴N?

A) ¹⁴C

B) ¹⁶N

C) ¹⁴O

D) ¹⁶O

E) All of the above

B) ¹⁶N

How many protons are in an atom of Co?

27

What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?

129

What is the mass number of zinc-65?

65

An atom of the isotope ¹³³Cs contains how many protons (p), neutrons (n), and electrons (e)?

A) 55 p, 55 n, 55 e

B) 55 p, 78 n, 55 e

C) 133 p, 133 n, 133 e

D) 55 p, 133 n, 55 e

E) 133 p, 55 n, 55 e

B) 55 p, 78 n, 55 e

What is the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons?

A) ⁵⁰Sn

B) ¹¹⁴Sn

C) ⁶⁴Sn

D) ⁶⁴Gd

E) ¹¹⁴Gd

B) ¹¹⁴Sn

Which of the following atoms has the same number of neutrons as ⁵⁹Ni?

A) ⁵⁷Co

B) ⁵⁸Fe

C) ⁵⁸Ni

D) ⁵⁹Co

E) ⁶⁰Cu

E) ⁶⁰Cu

What is the atomic number for an element whose mass number is 78, which contains 30 neutrons per atom?

48

The atomic mass of germanium (Ge) on the periodic table is 72.630 amu. Which of the following best explains why the atomic mass is a fraction between 72 and 73?

A) The presence of different isotopes

B) The presence of different isomers.

C) The formation of different ions.

D) The presence of different allotropes.

E) The presence of different amounts of protons.

A) The presence of different isotopes

The element antimony (Sb) has an atomic mass of 121.76 amu. Two naturally occurring isotopes of antimony are ¹²¹Sb (57% abundant) and ¹²³Sb (43% abundant). In a sample of 100 Sb atoms, what is the probability that a single selected atom has a mass of 121.76 amu?

A) 0%

B) 43%

C) 57%

D) 100%

E) Not possible to determine.

A) 0%

An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What is the average atomic mass in amu of X?

25.4 amu

An unknown element X has the following isotopes: ⁵²X (89.00% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X (3.00% abundant). What is the average atomic mass in amu of X?

51.7 amu

Chlorine exists in nature as a mixture of two stable isotopes, Cl-35 and Cl-37. If the atomic mass of chlorine is given as 35.45 amu, which of the following represents the percent abundance of Cl-37?

A) 23%

B) 77%

C) 50%

D) 0%

E) 100%

A) 23%

In a multi-electron atom, which orbital will have the highest energy?A) 4s

B) 4p

C) 4d

D) 4f

E) All are equal+

D) 4f

What element is designated by the orbital diagram below?

A) N

B) O

C) F

D) Ne

E) Cl

C) F

Of the following, which sublevel is filled last?

A) 3d

B) 4s

C) 4p

D) 4d

E) 5s

D) 4d

What element is designated by the orbital diagram below? (Note that core electrons are not shown.)

A) Co

B) Ni

C) Fe

D) Cu

E) Zn

Which of the orbital electron configurations is not possible?

A) 2s¹

B) 3d¹⁰

C) 4p⁷

D) 4f⁷

E) 2p⁶

C) 4p⁷

The ground state electron configuration of a Se atom is

A) 1s²2s²2p⁶3s²3p⁶4s²4p⁴

B) 1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p⁴

C) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴

D) 1s²2s²2p⁶3s²3p⁴

E) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³

C) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴

The ground state electron configuration of an Al atom is

A)1s²2s²2p⁶3s²3d¹

B) 1s²2s²2p⁶3s²3p¹

C) 1s²2s²2p⁶3s²3p⁶4s²4p¹

D) 1s²2s²2p⁶3s²3p²

E)1s²2s²2p¹

B) 1s²2s²2p⁶3s²3p¹

Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²?

A) Si

B) Ge

C) Sn

D) Ga

E) As

B) Ge

Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵?

A) Fe

B) Tc

C) Cr

D) Mn

E) Mo

D) Mn

Which of the following is the electron configuration of a neutral Fe atom?

A) 1s²2s²2p⁶3s²3p⁶4s²3d⁶

B) 1s²2s²2p⁶3s²3p⁶4s²4d⁶

C) 1s²2s²2p⁶3s²3p⁶4s²3d⁵

D) 1s²2s²2p⁶3s²3p⁶4s²4p⁶

E) 1s²2s²2p⁶3s²3p⁶4s²3d⁷

A) 1s²2s²2p⁶3s²3p⁶4s²3d⁶

What is the noble gas core in the electron configuration for Sb?

A) Ne

B) Ar

C) Kr

D) Xe

E) Rn

C) Kr

Which of the following is the electron configuration for Ba?

A) [Xe]6s²

B) [Rn]6s²

C) [Xe]6s¹

D) [Xe]7s²

E) [Rn]7s²

A) [Xe]6s²

Which element has the ground state electron configuration [Ar]4s²3d¹⁰4p⁵?

A) As

B) Br

C) Se

D) Te

E) I

B) Br

What is the noble gas electron configuration of Ca?

A) [Ne]4s²

B) [Ne]3s²

C) [Ar]4s¹

D) [Ar]4s²

E) 4s²

D) [Ar]4s²