Chemistry Week 3

Excited electron configuration

) 1s22s22p63s13p3 1s22s22p63s23p64s24p1 1s22s22p63s23p64s13d104p1 Something was "skipped"

How many electrons can be "stored" in a completely filled 4f sublevel?

14

ground state electron configuration

1s22s22p63s23p64s1 Looks normal

Which is the correct electronic configuration for Se (atomic number 34) in the ground state?

1s22s22p63s23p64s23d104p4

impossible electron configuration

1s22s22p63s23p8 1s22s22p63s23p64s23d12 "weirdly overfilled"

The correct order of increasing energy in the following subshells is:

2p, 3s, 3p, 4s, 3d

Which orbital is a spherical shape?

2s

In a single atom, what is the maximum number of electrons that can have quantum number n=4?

32

Which orbital is dumbbell-shaped?

3p

How many valence electrons are in silicon?

4

3.45g Fe2O3 contains 2.41gFe what percentage is Fe?

70% part divided by whole x100

AlxCly 58) C axNy 59) CxCly 60) PxHy A) x = 1, y = 3 B) x = 3, y = 2 C) x = 1, y = 4

Al1Cl3 Ca3N2 Ca1Cl4 P1H3 Find the charge then cross

The likely formula of the compound formed between Al and S is ________.

Al2S3

What is the trend in atomic size in the series of Group IIA elements Be through Ra?

Atomic size increases in this series.

Which of the following elements is the largest size halogen? A) Br B) K r C) He D) F

Br

Which of the following cations will have the electronic configuration 1s22s22p63s23p6 ? A) Ca2+ B) Sc1+ C) Cl1+ D) Co2+

Ca2+

The likely formula of the compound formed between Ca and O is ________.

CaO

Match each element in the first column with the most likely valence charge of its ion in the second column. 44) C 1 45) I A) (-1) B) (+1) C) zero 46) He 47) L i

Cl(-1) I(-1) He(0) Li(+1)

Which of the following anions will have the electronic configuration 1s22s22p63s23p6 ? A) K1- B) Br1- C) S1- D) Cl1-

Cl1-

Which of the following has the lowest ionization energy?

Cs down and left has lowest ionization energy

Match the outermost occupied orbital(s) in the first column with the corresponding element 4s13d10

Cu

Match the outermost occupied orbital(s) in the first column with the corresponding element 6s24f10

Dy

Which of the following subshells does not appear in the third shell?

F

A non-metal is an element that tends to gain valence electrons in chemical reactions becoming a cation in the process.

False

Blue visible light is of lower energy than red visible light.

False

The correct shortcut for writing the electronic configuration of Sr is [Ar]4s2.

False

Which of the following represents a physical property?

Hg is a shiny liquid at room temperature

Which of the following elements never obeys the octet rule?

Hydrogen

Atoms in which of the following groups will likely lose three electrons? A) VA B) IIA C) IIIA D) IVA

IIIA

The size of boron is ________ than that of oxygen and ________ than that of aluminum.

Larger, smaller

Predict the formula of the compound produced in a reaction between lithium (Li) and phosphorus (P).

Li3P

Which species has the following electronic configuration: 1s22s22p63s23p6 ? A) S- B) M g+2 C) P-3 D) F-

P-3

What is the main difference between "classical physics" and "quantum physics"?

Quantum physics requires that only certain, allowed values for energy be used.

Below are four pairs of atoms and ions. In which pair is the larger of the two species written first? A) O and O2- B) Cu2+ and Cu C) S2- and S D) Cr3+ and Cr

S2- and S

Which of the following does not have the neon electron configuration? A) O2- B) M g2+ C) S4+ D) Al3+

S4+

The scientist credited with developing the current mathematical model of the atom is ________.

Schrodinger

Which of the following species does not match the electronic configuration A) Br- B) Sr+2 C) Se+2 D) As-3

Se+2

) Which of the following has attained a noble gas electronic configuration? A) Cr3+ B) S i4+ C) Al3- D) Cl1+

Si4+

Which of the following cannot be defined as matter?

Temperature

An electron in the excited state does not necessarily return to a ground state in a single jump.

True

Blue visible light is of a higher frequency than red visible light.

True

Carbon can assume both +4 and -4 charges.

True

Metals generally become more reactive as one proceeds down a column (group).

True

Microwave is radiation of lower energy than visible light.

True

Modern atomic theory places electrons into complex mathematical probability functions called "orbitals."

True

Phosphorus atoms have five valence electrons.

True

The AMU is the weighted average of all naturally occurring isotopes.

True

The observed line spectra of electrically excited gas samples tend to support the notion that electron energies are quantitized.

True

The p-block represents a region on the periodic table which is 6 elements in width

True

Atoms in which of the following groups will likely gain three electrons? A) VIIA B) IIIA C) VA D) both A and B

VA

Match the outermost occupied orbital(s) in the first column with the corresponding element 5p6

Xe

Which color light is composed of photons having the largest energy? A) blue B) green C) red D) yellow

blue

For the electron of a hydrogen atom, which of the following quantum "jumps" requires the most energy?

from n = 1 to n = 2

A non-metal is an element that tends to ________ valence electrons in chemical reactions, becoming a(n) ________ in the process.

gain; anion

Which type of electromagnetic radiation is composed of photons having the largest energy? A) x rays B) radio waves C) gamma rays D) microwaves

gamma rays

A metal is an element that tends to ________ valence electrons in chemical reactions, becoming a(n) ________ in the process.

lose; cation

Which feature of Bohr's atomic model is no longer accepted as true by today's scientists?

that electrons orbit the nucleus in circular paths