question

The total maximum number of electrons in the 3p orbitals is 6. T or F

answer

True

question

A 3p orbital is larger than a 2 p orbital. T or F

answer

True

question

The Greek symbol used in chemistry notation for 'partial" or "slightly" is ?. T or F

answer

True

question

Different wavelengths of light carry different amount of energy. T or F

answer

True

question

A polar covalent bond is more ionic than an ionic bond. T or F

answer

False

question

Electronegativities generally decrease from left to right in the Periodic Table. T or F

answer

False
Electronegativities increase from left to right on the Periodic Table.

question

Water is an example of a polar molecule. T or F

answer

True

question

Phosphorous normally can be expected to form 3 bond with other elements. T or F

answer

True

question

The abbreviation for wavelength is the Greek letter ?. T or F

answer

False.
? = wavelength

question

Calcium has 4 electrons in its 4s orbital

answer

False.
An s orbital only supports up to 2 electrons

question

Silicon is an example of a "d-block" element. T or F

answer

False.
It's in the p-block.

question

The ionization energy for phosphorous is higher than for sodium. T or F

answer

True.
P WANTS electrons. Na isn't really that interested in more electrons.

question

The octet rule must be satisfied for all the element in C₂O₄H₂. T or F

answer

False.
H follows the duet rule, not the octet rule.

question

H₂O₂ is an example of a diatomic molecule. T or F

answer

False.Diatomic molecules: H₂, N₂, O₂, F₂, Cl₂, Br₂, and I₂.

question

Triple bonds contain a total of 6 electrons. T or F

answer

True

question

The reaction between Na⁰ and H₂O should be similar to K⁰ and H₂O. T or F

answer

True

question

The net charge of an ionic compound must be zero. T or F

answer

True

question

Li⁺ has the same properties as He. T or F

answer

False???

question

NH₄Cl sublimed in the Separation of Mixtures laboratory. T or F

answer

True

question

The number of valence electrons = Z minus the number of core electrons. T or F

answer

True

question

Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5

The correct dipole moment arrow for a Be-N bond is:

a. <+
b. +>
c. ^
d. v
e. no arrow, there is no dipole

answer

b. +>
Because N (3.0) has a higher electronegativity than Be (1.5).

question

KBr is:
a: a ternary compound
b: an element
c: a diatomic molecule
d: a globular cluster
e: an ionic compound

answer

e. an ionic compound

question

N₂ is:a. a binary compoundb. an elementc. a diatomic moleculed. a polar moleculee. an ion

answer

c. a diatomic molecule

question

Metallic gold is:
a. a binary compound
b. an element
c. a diatomic molecule
d. a metalloid
e. an ion

answer

b. an element

question

Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5

The type of bond in Be-Be is:
a. ionic
b. polar covalent
c. covalent
d. polar ionic
e. unstable

answer

c. covalent
Be = 1.5
1.5 - 1.5 = 0.0

question

Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5

The type of bond in C-F is:
a. ionic
b. polar covalent
c. covalent
d. polar ionic
e. unstable

answer

b. polar covalent
C = 2.5 F = 4
4 - 2.5 = 1.5

question

Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5

The type of bond in Be-F is:
a. ionic
b. polar covalent
c. covalent
d. polar ionic
e. unstable

answer

a. ionic
Be = 1.5
F = 4.0
4.0 - 1.5 = 2.5

question

Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5

The correct order of the following bonds from least polar to most polar is:
a. Be-C, Be-N, H-F, O-O
b. H-F, O-O, Be-N, Be-C
c. Be-N, Be-C, O-O, H-F
d. O-O, Be-C, Be-N, H-F
e. O-O, Be-N, H-F, Be-C

answer

d. O-O, Be-C, Be-N, H-F
O-O 3.5 - 3.5 = 0.0 Least Polar
Be-C 1.5-2.5 = 1.0
Be-N 1.5-3.0 = 1.5
H-F 4.0-2.1 = 1.9 Most Polar

question

The order of orbital filling begins with:

a. 1s, 2s, 2d, 2p
b. 3s, 2p, 2s, 1s
c. 1s, 2s, 2p, 2d
d. 1s, 2s, 3s, 4s
e. 1s, 2s, 2p, 3s

answer

e. 1s, 2s, 2p, 3s

question

H₂O has the molecular geometry:a. Trigonal pyramidb. Trigonal Planarc. Bent or V-shapedd. Tetrahedrale. Ternary

answer

c. Bent or V-shaped

question

Is it a chemical or physical change?Boiling liquid N₂ (like I showed in class)

answer

Physical

question

Is it a chemical or physical change?

The copper dome on St. Paul's cathedral turning blue-green

answer

Chemical

question

Is it a chemical or physical change?

Gasoline burning when you drive your car

answer

Chemical

question

Is it a chemical or physical change?

Formation of cans from molten aluminum

answer

Physical

question

Phosphorus electronic configuration

answer

1s²2s²2p⁶3s²3p²

question

Phosphorus orbital box diagram

answer

[^v]
[^v] [^v][^v][^v]
[^v] [^ ][^ ][^ ]

question

From the Periodic Table, what metalloid as 3d¹⁰ electrons and only 4p³ electrons?

answer

As

question

The following orbital box diagram for 1s²2s²2p⁴ is incorrect:[^v] [^v] [^v][^v][ ] What's the correct version?

answer

[^v] [^v] [^v][^ ][^ ]

question

Name an example of a positively charged ion and it's elemental symbol with the correct charged ion.

answer

SodiumNa⁺

question

Name an example of a negatively charged ion and it's elemental symbol with the correct charged ion.

answer

Chloride Cl^-

question

Name an example of an alkaline earth metal and it's elemental symbol with the correct charged ion.

answer

Magnesium Mg⁺²

question

Name an example of a halogen and it's elemental symbol with the correct charged ion.

answer

Bromine Br^-

question

Name an example of a noble gas.

answer

Argon

question

Name and example of a transition metal.

answer

Copper

question

Name the two types of ions.

answer

cations and anions

question

What is the isotopic symbol for Neon?

answer

²⁰₁₀Ne

question

How many neutrons does titanium have?

answer

47.88 - 22 = 25.88 = 26

question

Give the correct formula for a compound containing Cr³⁺ and S^2-:

answer

Cr₂S₃:

question

Write the correct name for MgS:

answer

magnesium sulfide

question

How many valence electrons and core electrons does each of the following have?
1. Chlorine
2. Calcium
3. Boron

answer

1. Chlorine -- 7val, 10core
2. Calcium -- 2val, 18core
3. Boron-- 3val, 2core

question

Give the proper name or chemical symbol for the following elements:
Nickel
Si
Potassium
Nitrogen
Carbon
S

answer

Nickel -- Ni
Si -- Silicon
Potassium -- K
Nitrogen -- N
Carbon -- C
S -- Sulfur

question

Use an orbital box diagram to explain why oxygen normally can be expected to form 2 bonds in any molecule:

answer

[^v] [^v] [^v][^ ][^ ]
1s2 2s2 2p4

Oxygen can be expected to form 2 bonds in any molecule because, as illustrated by the orbital box diagram, there are 2 "vacancies" in the 2 p orbital which O would like to fill with 2e-, thereby resulting in an electron configuration like that of a noble gas.

question

What needs to surround the Lewis Dot structure for PO₄^3-?

answer

__ ___ 3-
| |
| |
| |
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|__ __|

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