Element basics
This element has atomic number 1.
Hydrogen
Vertical columns on the periodic table are called these.
Groups
Metals usually look like this.
Shiny
Na, found in table salt.
Sodium
Ca helps build bones.
Calcium
What is the chemical symbol for Calcium?
Ca
Horizontal rows on the periodic table are called these.
Periods
Metals let this flow through them so lights and devices work.
Electricity
He, used in balloons.
Helium
N is the main gas in the air we breathe.
Nitrogen
The tiniest piece of an element that still acts like that element.
Atom
The very left side of the table has many metals that react easily with water (you can say they are very reactive) what are they?
They are reactive metals.
What is it called when a solid turns into a liquid.
Melting point
Fe, used to make metal tools and cars.
Iron
Cl is in bleach and helps kill germs.
Chlorine
What is the count of protons in an atom?
Hint: it identifies the element.
The atomic number
The far right side of the table has elements that are usually gases and do not react much. What are they called?
They are unreactive gases.
What is it called when a liquid turns into a gas.
Boiling point
Ag, a shiny metal used for jewelry.
Silver
Some elements are oxygen and nitrogen. What group in general are they called?
Gases
What is the average mass of an element’s atoms, because different atoms can weigh a little differently.
The atomic mass
Two long rows are shown separate at the bottom to keep the main table neat. What are they called?
They are called the bottom rows.
This property tells how heavy something is for its size.
Density
Hg, also a name for a planet.
Mercury
Bananas have a lot of this.
Potassium