What new characteristic did John Dalton add to the model of the atom?

1. An atom is a round, solid mass.

2. An atom has a massive, positive center.

3. An atom is made up of smaller particles.

4. An atom can join with other kinds of atoms.

Scientific models are based on a set of observations. true or false

Based on the equation, how many grams of Br2 are required to react completely with 29.2 grams of AlCl3?

What is the enthalpy of combustion (per mole) of C3 H8 (g) ?

What happens to the molecules when you heat a solid

Which set expresses the following numbers in scientific notation?: seven hundred-millionths, seven hundred million, and seven ten-thousandths.

Identify the precipitate (if any) that forms when KOH and Cu (NO3) 2 are mixed

An atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom?

The two forms of oxygen, O2 (g) and O3 (g), have (1) different molecular structures and identical properties (2) different molecular structures and different properties (3) identical molecular structures and identical properties (4) identical

What is the difference between a distraction and a reaction

if carbon which has an electrongavity of 2.5 bonds with hydrogen, which has an electrongavity of 2.1, the bond between the two atoms will be classified as a (n) covalent bond