Element Basics
The smallest unit of matter that still behaves like an element.
What is an atom?
The symbol for oxygen.
What is O?
This group contains highly reactive metals like sodium and potassium.
The atomic number of hydrogen.
What is 1?
This element is needed for life and makes up diamond and graphite.
What is carbon?
This is the central part of an atom containing protons and neutrons.
What is the nucleus?
The element with symbol Na.
What is sodium?
The elements on the far right of the periodic table.
What are the noble gases?
The atomic number of carbon.
What is 6?
The only metal that is liquid at room temperature.
What is mercury?
These negatively charged particles orbit the nucleus.
What are electrons?
This element has the symbol Fe.
What is iron?
Chlorine and fluorine belong to this family.
What are the halogens?
The element with atomic number 26.
What is iron?
This gas makes up about 78% of Earth's atmosphere.
What is nitrogen?
The total number of protons and neutrons in an atom's nucleus.
What is the mass number?
The symbol for the noble gas that makes up 1% of Earth's atmosphere.
What is Ar (argon)?
Elements like iron, copper, and gold belong to this block.
What are the transition metals?
The atomic number of the element that keeps balloons afloat.
What is 2 (helium)?
This element's name means "water-producer" because it forms water when burned.
What is hydrogen?
This is the number of protons in an atom.
What is the atomic number?
The element whose symbol is W.
What is tungsten?
The two bottom rows separated from the main table.
What are the lanthanides and actinides?
The element with atomic number 92.
The most abundant metal in Earth's crust.
What is aluminum?