Dalton's atomic theory states a) that an atom is predominantly empty space. b) that matter is composed of small indestructible particles. c) that the properties of matter are determined by the properties of atoms. d) that energy is neither created nor destroyed during a chemical reaction. e) that all elements have several isotopes. 2) identify a solid. a) definite volume and definite shape b) definite volume and no definite shape c) definite shape and no definite volume d) no definite shape and no definite volume 3) a substance that can't be chemically broken down into simpler substances is a) a homogeneous mixture. b) an element. c) an electron. d) a heterogeneous mixture. e) a compound. 4) two or more substances in variable proportions, where the composi

1.B. That matter is composed of small indestructible particles.  

2.A. Definite volume and definite shape.

3.B. An element

Explanation:

1.Dalton's atomic theory postulates:

1.It states that matter is composed of atoms that are  indivisible and indestructible.

2.Atoms of an elements are identical .They have same size ,chemical properties and mass.

3.Atoms of one element are different from atoms of another elements.

4.Compounds are composed of atoms of more than one elements.The relative number of atoms of each element in a given compound is always same.

5.Atoms are not created or destroyed during chemical reaction.

B.That matter is composed of small indestructible particles.  

2.Solid:It is that form of substance which have definite shape and definite volume.

Therefore, option A is true.

A. Definite volume and definite shape.

3.An element: it is a simpler substance .It cannot be broken into smaller substance by chemical reactions.

Therefore, option B is true.

B. An element

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the answer your looking for is c).