Question

The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents the number of @protons in an atom b) electrons in an ion neutrons in an atom d) protons and neutrons e) neutrons and electron's 5 All atoms with the same atomic number are grouped into a) molecules b) cells c) compounds @elements e) none of the above

Answer 1

1. The smallest chemical unit of matter is atoms because it is the most small unit which have the same properties as matter.

2.a molecule will have the largest size because a molecule is consist of more than one atom.

3. Neutrons in number because they all have same proton number because they are same atom they also have same electron as thy are neutral . That differ in mass number that only be possible when neutrons number is different.

4. Atomic number is represented by the number of proton present in nucleus.

5. Element is called when same atomic number will be present.