This is the smallest piece of an element that still represents that element.
What is an atom.
100
A positively charged atomic particle.
What is a proton.
100
The atomic mass of an element.
What is the total number of protons and neutrons in an atomic nucleus.
100
A chart of the elements arranged into rows and columns according to their physical and chemical properties.
What is the periodic table.
100
Elements on the periodic table that are usually shiny, easily hammered into thin sheets or pulled into wires, and are good conductors of electricity.
What are metals.
200
An atom is made up of these.
What are protons, neutrons, and electrons.
200
A negatively charged atomic particle.
What is an electron.
200
In a neutral atom, the number of electrons is equal to this.
What is the number of protons.
200
Determines where an element is located on the periodic table.
What is the atomic number.
200
Elements on the periodic table that have higher melting points, greater strength, and higher density than alkali and alkaline metals, and react quickly with oxygen.
What are transition elements.
300
This is the small area in the center of an atom where most of the atom's mass is concentrated.
What is the nucleus.
300
A neutral atomic particle.
What is a neutron.
300
Atoms of the same element that have different numbers of neutrons.
What is an isotope.
300
A column on a periodic table.
What is a group.
300
Elements on the periodic table that are often gases at room temperature, are poor conductors of electricity, and are good insulators.
What are nonmetals.
400
Something that is made up of only one kind of atom.
What is an element.
400
This represents the number of protons in an atom of an element on the periodic table.
What is the atomic number.
400
This type of atom that has fewer electrons than protons, making the atom positively charged.
What is a cation.
400
A row on the periodic table.
What is a period.
400
Elements on the periodic table that have physical and chemical properties of both metals and nonmetals.
What are metalloids.
500
Protons and neutrons are located in this part of an atom.
What is the nucleus.
500
Where electrons in an atom are located.
What is a cloud orbiting the nucleus of an atom.
500
This is an atom that has more electrons than protons, making the atom negatively charged.
What is an anion.
500
Helium, neon, argon, krypton, xenon, and radon.
What are the noble gases.
500
Elements on the periodic table that can react with metal and form salt.