Periodic Table Quizizz

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

In the modern periodic table elements are arranged by:

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

Which is an electron?

• A
• B
• C

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

Who first came up with the idea of atoms?

• Democritus

• Aristotle

• John Dalton

• JJ Thomson

Who came up with the theory that matter was made of

small, hard, indivisible particles that could not be

divided into smaller pieces?

• Democritus

• Aristotle

• James Chadwick

• Niels Bohr

What are the four parts of Dalton's Atomic Theory?

(select 4)

• Atoms are Tiny, Indivisible particles

• Atoms of one element are all the same

• Atoms of different elements are different

• Compounds form by combining atoms

• Atoms of the opposite force attract each other