the atomic theory

A chemical compound always has the same elements in the same proportions by mass regardless of the source of the compound. This is a statement of

• the law of multiple proportions.

• the law of isotopes.

• the law of definite proportions.

• the law of conservation of mass

Which subatomic particle has a charge of +1

• electron

• neutron

• proton

• meson

Which particle has the least mass

• electron

• neutron

• proton

• All have the same mass.

Look at the figure to answer the question below

What subatomic particle did Thomson discover?

• proton

• electron

• neutron

• atom

Mass is neither created nor destroyed, this is called ?

• law of conservation of mass

• law of multiple proportions

• law of definite proportionality

• law of the universe

which on of Dalton's postulates is wrong?

• the atom can't be subdivided

• the atoms of the same element have the same properties

• atoms can be rearranged to create a compound

• atoms are the smallest particles

the word isotops mean?

• same atomic mass different atomic number

• same atomic number different atomic mass

• same element different atom

• same atom different element

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Tags

NGSS.HS-PS2-4

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

Where electrons are likely to be found as they travel around the nucleus

• Nucleus
• Electron Cloud
• Within a Proton
• Within a Neutron