Chemistry--First Term Review

Chapter 1

100

Chemistry is considered a ______________ science.

Central

200

The branch of Chemistry pertaining to matter and its relationship to Energy.

Physical

300

The three building blocks of matter

Atom, Element, Compound

400

The two properties used to differentiate between a solid, liquid and gas

Shape and Volume

500

What is the difference between a mixture and a pure substance?  List an example of each.

Mixture--can be physically separated

Pure Substance--Cannot be broken down any further.

Ex:  Will Vary

Chapter 2

100

Quantitative data deals with

Numbers

200

List three of the seven base units of the SI system

Mass (g)

Length (m)

Time (s)

Temperature (K)

Amount of Substance (mole)

Current (A)

Luminous Intensity (cd)

300

Convert 25.03 kg into dg.

250,300 dg

400

A substance has a Density of 2.549 g/cm³ and a mass of 63.0 g.  What is the volume of the substance?

V = 24.7 cm³

500

A student conducts an experiment and receives a density of 3.89 g/mL.  The known value provided for the density is 4.01 g/mL.  What is the students percent error?  Is this good data? Explain.

2.99 % Error

Yes, this is good data because it is under 5%

Chapter 3

100

State that atoms cannot be subdivided, created or destroyed.

John Dalton

200

This lab device was used to help discover the electron by passing electric current through compressed gas and exposing the beam created to a magnet.

Cathode Ray Tube

300

How did scientists know to continue the search within the atom to discover the nucleus?

1) If there was a negative there had to be a positive.

2)  The electron did not account for the mass of the atom.

400

Calculate the p, n, and e- in Ge-74.

p = 32

n = 42

e- = 32

500

How many atoms are in 4.006 g of Mn?

4.391 x 10²² atoms of Mn

Chapter 4

100

What question was still be asked about electrons at the beginning of the 1900s?

Where are they?

200

If n = 5, how many electrons are present?

50 electrons

300

Calculate the frequency of a wave with a wavelength of 698 nm.

v = 4.30 x 10¹⁴ Hz

400

Explain the process of absorption within an atom.

When electrons are hit with photons of energy and absorb the energy.  They then jump to the next energy level.

500

Write the electron configuration for Br and answer the following:

1) Highest Energy Level?

2)  Valence e-?

3) Unpaired e-?

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵

1) 4

2) 7

3) 1

Chapter 5

100

Organized the Periodic Table by p+

Moseley

200

The repeating of trends from left to right and top to bottom on the Periodic Table

Periodic Law

300

What is the name and group number of the most reactive group of nonmetals on the Periodic Table?

Group 17--the Halogens

400

The ability of an atom to attract electrons is known as 

Electronegativity

500

For the element P, answer the following:

1) Group

2) Valence

3) Gain/Lose

4) Charge

5) Cation/Anion

6) What happens to the Ionic Radii?

1) 15

2) 5

3) Gain

4) P^-3

5) Anion

6) Increases/Gets Larger