chem 2

Which color (frequency) of light travels the fastest in a vacuum?

All have the same speed

Energy of a photon is ______ proportional to frequency, and _______ proportional to wavelength.

directly, inversely

A photon has a frequency of 8.63 × 10⁸ Hz. What is the energy of this photon in Joules? (h = 6.626 × 10⁻³⁴ J • s)

5.72 × 10⁻²⁵ J

Photons are shone on a piece of metal and one electron is ejected for each absorbed photon. What happens when the wavelength of light is decreased?

The ejected electrons would have greater kinetic energy.

Which of the following is true concerning ψ²?

ψ² describes the probability of finding an electron in space.

Which scientist surmised the scientific principle that the position and momentum of an electron cannot be known simultaneously with a high degree of accuracy?

Heisenberg

Which particle would have the longest de Broglie wavelength traveling with the same velocity?

electron

What is the de Broglie wavelength (in meters) of a 58.1 g tennis ball when served at a velocity of 44.5 meters per second?

2.56 × 10⁻³⁴ m

Which of the following sets of quantum numbers can describe a 4s electron?

n = 4, ℓ = 0, mℓ = 0

Which of the following sets of quantum numbers is not allowed?

n = 2, ℓ = 2, mℓ = 2

Which of the following states that no two electrons can have the same set of four quantum numbers?

Pauli exclusion principle

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

Kr

The ground state electron configuration of a Se atom is

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4.

Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²?

Ge

Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵

Mn

Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s¹3d⁵?

Cr

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

1s²2s²2p⁶3s²3p⁶4s¹

How many electrons are in the n = 1 shell in a neutral fluorine atom?

2

How many valence electrons are in a neutral atom of chlorine?

7

How many valence electrons are in a neutral atom of magnesium?

2

How many valence electrons are in a neutral atom of nitrogen?

5

How many valence electrons are in a neutral atom of oxygen?

6

Which element has the ground state electron configuration [Kr]5s²4d¹⁰5p³?

Sb

Which following ions has the same electron configuration as a noble gas?

N³⁻

The ground state electron configuration of an Al atom is

1s²2s²2p⁶3s²3p¹

Which of the following is the electron configuration for Ba?

[Xe]6s²

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

1s2 2s2 2p6 3s2 3p6 4s2 3d6.

What is the electron configuration of K⁺?

1s²2s²2p⁶3s²3p⁶

Which element has the ground state electron configuration [Xe]6s²4f¹⁴5d⁴?

W

What quantum mechanics principle states that electrons are added to atomic orbitals with the same energy so that each orbital is singularly occupied with electrons having the same spin?

Hund's rule

Elements that are most similar in their properties are found _____

in the same group.

Which periodic trend quantifies the amount of energy required to remove an electron from a neutral, gaseous atom?

Ionization Energy

Which of the following groups of elements tend to form cations?

Metals

Rank the following atoms in order of decreasing size (i.e., largest to smallest): Rb, F, Mg, B, N.

Rb > Mg > B > N > F

Rank the following atoms in order of increasing first ionization energies (i.e., lowest to highest): Rb, F, Mg, B, N

Rb < Mg < B < N < F

Rank the following atoms in order of increasing size (i.e., smallest to largest): Li, Al, Be, Ba, O.

O < Be < Li < Al < Ba

All of the following pairs of ions are isoelectronic except which one?

Fe²⁺ and Mn³⁺

Which of the following series of isoelectronic ions (Mg²⁺, N³⁻, F⁻, Si⁴⁺) has the ionic radii in order of largest to smallest?

N³⁻ > F⁻ > Mg²⁺ > Si⁴⁺

The element symbol for arsenic is _____

As

The element symbol for tin is ____

Sn

The symbol Hg represents the element ____

mercury

What element has the symbol Ag?

silver

What is the element symbol for gold?

Au

Which of the following elements would be chemically similar to calcium (Ca)?

Sr

Which of the following is a halogen?

Iodine

Which of the following is a main group element?

Bismuth

Which of the following is a transition metal?

Silver

Which of the following is an alkaline earth metal?

Beryllium

The element symbol for lead is __.

Pb

Which of the following is most likely to form a +2 ion?

Mg

Which of the following elements is NOT a metal?

A) arsenic

B) indium

C) iridium

D) lithium

E) lutetium

arsenic

H

Hydrogren

He

Helium

Li

Lithium

Be

Beryllium

B

Boron

C

Carbon

N

Nitrogen

O

Oxygen

F

Flourine

Ne

Neon

Na

Sodium

Mg

Magnesium

Al

Aluminum

Si

Silicon

P

Phosphorus

S

Sulfer

Cl

Chlorine

Ar

Argon

K

Potassium

Ca

Calcium

Sc

Scandium

Ti

Titanium

V

Vanadium

Cr

Chromium

Mn

Manganese

Fe

Iron

Co

Cobalt

Ni

Nickle

Cu

Copper

Zn

Zinc

Ga

Gallium

Ge

Germanium

As

Arsenic

Se

Selenium

Br

Bromine

Kr

Krypton

Xe

Xenon

Ba

Barium

Pt

Platinum

Hg

Mercury

Bi

Bismuth

Sr

Strontium

Ag

Silver

Sn

Tin

I

Iodine

Cs

Cesium

Au

Gold

Pb

Lead

Covalent bond

sharing of electrons between two atoms

• nonmetals form covalent bonds with each other