Atoms and The Periodic Table

Atomic Structure

100

This subatomic particle has a positive charge

Proton

200

The mass number is these two particles combined

protons and neutrons

300

This particle has a negative charge

electron

400

How many electrons can fit on the second energy shell?

8

500

This particle determines the identity of an element

proton

Isotopes

100

Isotopes of an element have different numbers of _____.

neutrons

200

What form is this isotope written in?

⁹Be

nuclear form

300

What is the most common isotope of carbon?

Carbon - 12

400

What are the steps for calculating the average atomic mass?

1) divide % by 100

2) Multiply by mass

3) Add together

500

How many neutrons are in this isotope?

Nitrogen - 15

8

Groups on the Periodic Table

100

Name of Group 1

Alkali Metals

200

Which group number is the noble gases?

18

300

Element Numbers 57 - 71 are called the __________. 

Lanthanides

400

Hydrogen is part of the _____________ grouping. 

Nonmetal

500

This element is in Group 13 and Period 4.

Gallium. 

Nuclear Chemistry

100

This type of decay does not release a particle, but releases energy. 

Gamma

200

This is the time it takes for half of a radioactive sample to decay.

Half-life

300

Fill in the missing piece of the equation below:

²³⁸₉₂U -->  ⁴₂ He  +  ______

²³⁴₉₀ Th 

400

A sample has a half life of 5 years. How much of a 100g sample remains after 15 years? 

12.5g

500

How many half lives have passed for a sample to decay from 80g to 10g?

3 half lives

(80 -> 40 -> 20 -> 10)

      1        2         3

Periodic Table Basics

100

Columns on the periodic table are called ____________. 

Groups (or families)

200

Rows on the periodic table are called ________.

periods. 

300

This tells us the number of VALENCE electrons

Group Number

400

This tells us the number of electron shells (energy levels)

Period number

500

Phosphorus has _________ valence electrons. 

5