GC1 WEEK 2

In 1808, John Dalton published his book entitled “____________”, where he proposed an atomic theory of matter

• Dalton's Atomic Theory

• A New System of Chemical Philosophy

• Atomic Theory of Matter

SUBATOMIC PARTICLES

• proton, electron, neuron

• anions, catanions

• ionic, covalent

• monatomic, diatomic, polytomic

• is the outermost regions of the atom

which are also called electron shells because it

contains the electrons (negatively charged)

• Orbit

• Nucleus

• Protons

• Electrons

• is the center of the atom that contains

the protons (positively charged) and the

neutrons (no charge)

• Orbit

• Nucleus

• Protons

• Electrons

The ____________ of an element represents the number of protons in it’s nucleus.  It is represented by the symbol Z

• atomic mass

• atomic symbol

• atomic number

The __________ indicates the total number of protons and neutrons. It is represented by the symbol A

• atomic mass

• atomic symbol

• atomic number

The number of electrons is the same as the number of protons.

• True

• False

Find the right fomula: Atomic mass (A)

• number of protons = number of electrons

• A - Z

• number of protons + number of neutrons

Find the right fomula: Atomic number (Z)

• number of protons = number of electrons

• A - Z

• number of protons + number of neutrons

Find the right fomula: Neutrons

• number of protons = number of electrons

• A - Z

• number of protons + number of neutrons