How do the three isotopes O-14, O-18, and O-20 differ?

The reason carbon-12 and carbon-14 are different because

Boron-10 and Boron-11 are isotopes of the same element. What do they have in common?

An atom loses an electron, what is its overall charge?

Protons are found

A nitrogen (N) atom has 7 protons, 9 neutrons and 10 electrons. What is the atomic mass of nitrogen?

Electrons are found

Light is emitted when electrons

Group 1 on the periodic table (with the exception of hydrogen) is called

Elements in the same period have similar chemical properties

How many valence electrons does Aluminum have?

How many protons are found in an atom of lead (Pb)?

Which element has similar chemical properties to sodium (Na)?

Atoms react with other atoms based off of their number of valence electrons. Which element has the most valence electrons?

Elements in the same group or family have the same number of valence electrons. How many valence electrons are in the Halogens family?

Metalloids are elements that

U-238 and U-239 both have the same number of

Most elements on the periodic table are

Metals tend to lose electrons and become positively charged, while non-metals tend to gain electrons and become negatively charged

Ionization energy ________________________ from left to right and ___________________________ down a column