Question

What are three main ideas in dalton's atomic theory? Check all that apply. Check all that apply. There are as many negatively charged electrons outside the nucleus as there are positively charged particles (protons) inside the nucleus, so that the atom is electrically neutral. Elements are composed of atoms. Most of the volume of the atom is empty space through which the tiny, negatively charged electrons are dispersed. All atoms of an element are identical, and each element has unique atoms. Most of the atom's mass and all of its positive charge are contained in a small core called the nucleus. Atoms combine to form compounds in simple, whole number ratios?

Answer 1

Statements of questions:

There are following statements given in question are true according to Dalton theory which are following

1. Atoms combine to form compounds in simple, whole number ratios.
2. All atoms of an element are identical, and each element has unique atoms,
3. Elements are composed of atoms.

While the remaining points were discovered after the Dalton theory.

1. An atom is divisible( Proton, neutron, electrons).
2. Atom is neutral.
3. Idea about nucleus.
4. Shell and sub-shells of electron around the nucleus
5. Space in atom

Main ideas of Dalton theory:

1. According to Dalton's theory, matter is composed of atoms, these atoms are indivisible.
2. Each element has same atoms while different elements have atoms of different size.
3. According to Dalton's theory, all compounds were formed by the combination of atoms in define ratio.
4. According to Dalton's theory, re-arrangements of these atoms causes the chemical reactions.

Limitations of Dalton theory:

• Atoms are divisible, atoms consist of three fundamentals particles protons, neutrons and electrons.

• Sometime atoms of same elements may have different masses.

• Sometime atoms of same elements may have different masses.

• There is no necessary for atoms of different elements that they will combine in simple whole number ratio.