4. Atoms and Elements

In the simplified atomic model, what is the approximate mass of one neutron?

Which element has 38 protons in its nucleus?

In a neutral atom of lithium (Li), how many protons are in the nucleus?

Which element is represented by an atom that has 2 protons, 2 neutrons, and 2 electrons?

How many protons are in an atom of sodium (Na)?

Which element has 56 protons in its nucleus?

How many protons are in an atom of magnesium (Mg)?

An atom has $82$ protons, $86$ electrons, and $125$ neutrons. Which element is it?

In the context of subatomic particles, how many protons are in one atom of carbon (C)?

In a simplified model of the atom, which subatomic particles are considered the heavy particles (i.e., account for nearly all of the atom’s mass)?

In a simplified model of the atom, where is a proton located?

In the simplified model of subatomic particles, what do an electron and a neutron have in common?

Which statement is true about a proton and an electron?

In a simplified model of the atom, which subatomic particle has a positive charge?

A neutral atom of tellurium (Te) has atomic number 52. How many protons are in one Te atom?