Atomic Theory

Who is given credited for coining the term atom (from the Greek word Atomos =indivisible)

Gold has mass number 197. What are its p,n,e?

Who is given credit for defining the number of atoms in one mole?

Table salt is always 61% chlorine and 39% sodium.

His Atomic Theory was based largely on the 3 Laws (Conservation, Definite and Multiple).

This Theory uses all data to give us what we now know about our model of the atom.

How many neutrons does Rubidium have if its mass is 85?

Element Z has an ave atomic mass of 78.5. Its two isotopes are 78 and 80. What is the % of 78?

What is the molar mass of water?

How many protons does Tellurium have if it has a mass of 128

What unit does molar mass have?

1.00 g H₂O= _____ atoms H₂O

Copper has mass 64. What are its p,n,e ?

4.72 g Be = ____ mol Be

723 atoms S = _____ g S

Who discovered the nucleus?

Who discovered the electron?

H₂O 1.0g H,8.0 g O ; H₂O₂ 1.0g H, 16.0 g O;8:16 looks like a 1:2 ratio

4.0 g S + 7.0 g Fe combine to form 11.0 g FeS

The smallest particle of an element that retains the chemical properties of that element.

2.1 X 10²⁴atoms Cr= ____ g Cr

Who discovered the quantity of charge on the electron?

Element Q is made up 0f 34% mass 52 and 66%mass 53. What is its Average Atomic Mass?

How many electrons does Gadolinium have if its mass is 157?

Atoms of the same element with differing numbers of neutrons.

Who said matter is divisible infinitely?

3.2 mol W=___ atoms W