Atomic structure

The number of ____________ is what determines the identify of the elements.

• Protons

• Neutrons

• Electrons

• Nucleus

The nucleus contains which of the following subatomic particles?

• Electrons and protons

• Electrons and neutrons

• Neutrons and protons

• Protons and atoms

Which part of an atom is the most dense?

• The electron cloud

• The nucleus

• The space in between the nucleus and the electrons

Which element on the periodic table has 5 protons?

• Carbon

• Rubidium

• Boron

• Fluorine

How many neutrons does Chlorine have?

• 17

• 35

• 18

• 15

Which element has an atomic number of 14?

• Silicon

• Nitrogen

• Aluminum

• Sodium

Which element has an atomic mass of 40?

• Zirconium

• Titanium

• Cobalt

• Calcium

A non-charged atom of Beryllium would have how many electrons?

• 4

• 5

• 9

• 11

Tags

NGSS.MS-PS1-1

An atom is charged (meaning its an ion) when...

• There are an equal number of protons and neutrons

• There are an equal number of protons and electrons

• There is an unequal number of protons and electrons

• There is an unequal number of protons and neutrons

Adding a neutron to an atom will change the element. Which of the following is a statement that disproves the previous statement?

• Adding a neutron changes the atomic number, not the element

• Adding a neutron changes the mass, not the element

• Adding a neutron changes the charge of the atom, not the element

• Adding a neutron changes the row an atom is in, not the element