Unit 1 Exam

Vocabulary

100

What is a period? 

Horizontal row in the periodic table. 

200

What is Valence Electron? 

The electrons that are occupying the outermost shell. 

300

What is an Isotope? 

are atoms of the same element that have the same number of protons but different masses due to having a different number of neutrons.

400

What is an Ion? 

An atom in which the number of electrons is different from the number of protons, causing a net positive or negative charge.

500

What is Dimensional Analysis? 

mathematical approach that can be applied to computations ranging from simple unit conversions to more complex, multi-step calculations involving several different quantities.

Electron Configuration

100

What is the electron configuration of Lithium (Li)? 

How do you check if you are right? Hint. Exponents

1s² 2s¹

Adding all the exponents up to give you the atomic number.

200

The scholar wrote down the electron configuration of scandium (Sc). Is there a mistake? If so, explain why.

1s¹ 2s² 2p⁶ 3s² 3p⁶ 4s¹ 4d¹

Scholar wrote down 1s¹ and 4d¹

The correct answer should be 

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹

300

The scholar wrote down the shorthand version of electron configuration of Vanadium (V). Is there a mistake? If so, explain why.

[Kr] 4s¹ 3d³

Yes, there is a mistake. 

It should be [Ar] 4s¹ 3d³

400

What is the electron configuration of chlorine? 

Write down the shorthand version as well. 

1s² 2s² 2p⁶ 3s² 3p⁵

[Ne] 3s² 3p⁵

500

What is the electron configuration of Titanium (Ti) and shorthand version of it as well? 

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²

[Ar] 4s² 3d²

Formulas

100

The photon is assumed to have a wavelength of 4.5×10^-7M. What is its frequency?

6.67X10¹⁴

200

The frequency of a red flame is 3.03×10^-19J. Determine the amount of energy.

2.0*10^-52J

300

How many atoms are in 15.0 grams of Carbon (C)?

7.5x10²³ atoms

400

How many moles are in 5.0X10²² atoms of Carbon (C)?

0.083 moles

500

How many atoms are in 7.0 grams of Hydrogen(H)?

4.2x10²⁴ atoms

Everything else

100

Which has the greatest mass?

Hydrogen

Carbon

Helium

Carbon. 

200

Which orbitals are involved in valence electrons?

S and P

Some Pigs Do Fly

300

There is a Bohr Model. The Bohr model has 11 dots. What group and period are this element in? Name the element. 

Group 1. Period 3. Sodium (Na).

400

How many Valence Electron does Oxygen (O) have? 

6

This is in group 16. Cover the 1. There is 6 only. 

500

Isotope: Br-82

Isotope Notation

Atomic Number

Mass number

Protons/Electrons:

Neutrons

 

 

 

 

 

 

 

 

Isotope: Br-82

Isotope Notation 

Atomic Number: 35

Mass number: 82

Protons/Electron: 35

Neutrons: 47

Periodic table

100

Which two contributes to charges? 

Proton

Neutron

Electron

Proton and Electron

200

List all the elements that would have the same valence electrons has Oxygen (O). 

S, Se, Te, Po, Lv

300

Which causes color change? Metal or Nonmetal.

KCl = red

LiCl = Hot Pink

Li₂SO_{4 =} Hot Pink 

The METAL causes the color to change. 

Because different metal chlorides yield distinct flame colors, the nonmetal (chloride) can be eliminated as the source of the color change.

400

Which two contributes to atomic mass? 

Proton

Electron

Neutron

Proton and Neutron 

500

Draw a diagram of where there is least and greatest deflection. Explain the mass. 

This will vary. Teacher will determine if you are right.