Chemistry Semester 1 Review

Unit 1

100

What device do we use to measure the mass of a substance?

Balance or Scale

200

What is accuracy?

How close a value is to the true/correct value

300

How many significant figures are in 0.00310580 ?

0.00310580

6 Sig Figs

400

What is the percent error for a measured value of 23.5 mL when the theoretical value is 25.0 mL?

6%

500

Convert 74.3 cm to km.

Given: (100 cm = 1 m) and (1000 m = 1 km)

0.000743 km

or

7.43 x 10^-4 km

Unit 2

100

How many protons are in Carbon?

6 (Atomic number)

200

What subatomic particles are inside the nucleus?

protons and neutrons

300

How many electrons fit in the first and second rings of an atom?

First:2

Second: 8

400

Why are these isotopes of each other?

C-12 , C-13 , C-14

Same element, different mass

(same protons, different neutrons)

500

Name two ways that new elements were made

Fusion: atoms merge

Fission: atoms split apart

Supernova: stars explode

Man Made: particle accelerators

Unit 3

100

What are the vertical columns in the Periodic Table Called?

Groups / Families

200

Oxygen is a: ________

(metal/nonmetal/metalliod)

Nonmetal

300

What element has this eletron configuration?

1s²2s²2p⁶3s²3p²

Silicon (Si)

400

How many orbitals does the p subshell have?

(think of the lines in Orbital Diagrams)

3 orbitals: _ _ _

(can fit 6 electrons)

500

Which element is larger in radius?

Potassium (K) or Calcium (Ca)

Potassium (K)

- Radius decreases as you go right

Unit 4

100

What is the name of this compound NaCl?

sodium chloride

200

What is the name of the compound N₂O₄ ?

dinitrogen teraoxide

300

What is the compound that is formed from Lithium (Li) and Nitrogen (N)?

Li₃N

400

Which is the type of bonding that transfers (gives away) electrons?

IONIC Bonding

500

How many dots would be drawn around the Lewis Dot Structure for Oxygen?

6 (group #6)

Miscellaneous

100

What is Ms. Zapien's Starbucks order?

Iced Matcha Latte w Soy Milk

200

What type of reaction is called when there is a RELEASE on energy?

exothermic

300

What element is in Period 5 group 5A?

Antimony (Sb)

400

What is 11.2cm x 2.0cm with correct significant figures?

22 cm² or 22.cm²

500

If two atoms of Helium (He) are fused through FUSION, what is the element that is created?

Helium has 2 protons, two Heliums would form a nucleus with 4 protons, which forms the element

Beryllium (Be)