Atomic Theory

Search about the matter to describe it.

• Aristotle

• Dalton

• Thomson

• Democritus

Groups on the periodic table are:

• horizontal rows

• vertical rows

How many periods are on the periodic table?

• 5

• 7

• 6

• 8

Elements in the same group have:

(multiple answers)

• similar chemical properties

• similar names

• same number of protons

• same number of outer electrons

Are metals elements: (multiple answer)

• Mn (manganese)

• Os (osmium)

• Au (gold)

• Ag (silver)

Are metalloids elements:

• B (boron)

• Si (silicon)

• As arsenic

• Br (bromine)

He used the table to predict elements that had not yet been discovered using the properties of the previous elements.

• Lothar Meyers

• Dimitri Mendelev

• ThomsonJohn Newlands

Questioned whether matter coulb be divided into smaller pieces and the smallest piece of matter, the atom, was indivisible.

• Aristotle

• Dalton

• Thomson

• Democritus

Democritus named the smallest piece of matter "atomos"

• Aristotle

• Dalton

• Thomson

• Democritus

Atom mean is

• particle

• small particle

• not to be cut