Atoms

The positive particles of an atom are ___________.

• electrons

• protons

• neutrons

The center of an atom where its neutrons and protons are is called the _____________.

• nucleus

• electron cloud

• center

An atom is made up of protons, neutrons, and electrons.  Which is the smallest subatomic particle?

• Proton
• Neutron
• Electron
• Idontknowatron

Which is an electron?

• A
• B
• C

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

How many electrons does Si contain? (click to see image)

• 14
• 28
• 2
• 4

What is the mass number and name of an element with 8 protons and 8 neutrons?

• 16 - Carbon
• 16 - Oxygen
• 24 - Oxygen
• 8 - Neon

Which shows the correct parts of the nucleus?

• Neutron and Electron

• Neutron and Proton

• Proton and Electron

• Proton, Neutron and Electron

Which part of an atom has the smallest mass?

• Proton

• Neutron

• Electron

• They are all the same

Which part of an atom has a positive charge?

• Proton

• Neutron

• Electron

• None of them