ATOMS (Mr. Lind)

ATOMIC THEORY

100

Who was the FIRST person to theorize that matter consisted of atoms?  (He also came up with the term "atom")

Democritus

200

Atoms of the same element have the same __.

properties

300

Atoms cannot be subdivided, __ or __.  

created or destroyed

400

Atoms can combine to form __.

compounds 

molecules

500

In __, atoms are combined, separated or rearranged.

reactions

COUNTING PARTICLES

100

DAILY DOUBLE!

Which 2 subatomic particles have a mass of 1 amu?

Protons

Neutrons

200

Atomic number ALWAYS tells us the number of what subatomic particle?

protons

300

How many protons, neutrons, and electrons are in a fluorine (F) atom?

P = 9

N = 10

E = 9

400

DAILY DOUBLE!

1) How many protons, neutrons, and electrons are in a barium (Ba⁺²) ion?

2) What type of ion is Ba⁺² ?

1) P = 56   N = 81   E = 54

2) a cation

500

How many protons, neutrons, and electrons are in a carbon - 14 (¹⁴C) isotope?

P = 6

N = 8

E = 6

ATOMIC MASS

100

What is the most common isotope of hydrogen in our universe?  H - 1 (protium), H - 2 (deuterium), or H - 3 (tritium)?

H - 1 (protium)

200

What is the % composition of each element (by mass) in an ammonium (NH₃) molecule?

82.4% N, 17.6% H

300

A mineral in Earth's crust is 25.5% Magnesium (Mg) and 74.5% chlorine (Cl) by mass.  What is the formula of this mineral?

MgCl₂

400

Bluejayon (Bj) has 2 isotopes in nature.  Use the information below to find its average atomic mass:

Bj-123  exact mass = 123.123; 67% abundance 

Bj-128  exact mass = 127.987; 33% abundance

(Round your answer to 3 decimal places)

124.728 amu

500

Lithium has 2 isotopes in nature (Li - 6 and Li - 7).  Li - 6 has an exact mass of 6.0151223 u and an abundance of 7.5%.  What is the exact mass of Li - 7?  (Do not round your answer)

7.0160041 u

HOLY MOLEY!

100

6.02 x 10²³ atoms of gold (Au) = __ moles?

1 mole

200

What is the mass of 1 mole of salt (NaCl)?

58 g

300

7.5 moles of oxygen gas (O₂) = ___ g

240 g

400

3.0 x 10⁵⁰ molecules H₂O = __ g

8.97 x 10²⁷ molecules

500

What is the mass (in grams) of 1 water (H₂O) molecule?

2.99 x 10^-23 g

0.0000000000000000000000299 g

POTPOURRI

100

DAILY DOUBLE!

1) what is the name for the counting unit used to count particles?

2) who came up with this counting unit?

1) mole (mol)

2) Avagadro

200

What does the word "atom" mean in Greek?  (1 word)

indivisible

300

DAILY DOUBLE!

How many oxygen (O) atoms are in each compound?

1) C₆H₁₂O₆

2) Ca(NO₃)₂

1) 6

2) 6

400

A substance is 68.4% chromium (Cr) and 31.6% oxygen (O) by mass.  What is its empirical formula?

Cr₂O₃

500

What is Avagadro's first name?

Amadeo