Question

elements and the periodic table- reading comprehension
directions: answer the fill-in-the-blank and multiple choice questions. questions follow the
order of concepts in the provided text.
part i. — fill in the blank (12 questions — in text order)

1. the atom is described as the building block of
2. john dalton’s ideas are known as dalton’s
3. according to dalton, elements are composed of small, indivisible particles

called

1. dalton stated that atoms of the same element are
2. dalton also stated that in chemical reactions atoms are

but do not change.

1. j.j. thomson proposed the model in 1904.
2. thomson discovered small, negative particles called
3. rutherford’s gold foil experiment used helium

particles shot at gold foil.

1. rutherford concluded there is a at the center of

the atom that houses the protons.

1. sir james chadwick discovered the in 1932.
2. protons have a charge and are located in the

1. electrons are located in the that surrounds the

nucleus.

part ii. — fill in the blank / short answer (6 questions — continuing order)

1. neutrons are (charge) and contribute to the

of an atom.

1. the mass of a proton or neutron is about amu.
2. the electron’s mass is so small it is considered amu.
3. the periodic table arranges elements into columns called
4. the rows on the periodic table are called
5. the atomic number equals the number of in an atom

Explanation:

Part I: Fill in the Blank

1. Explanation for Q1: Atoms are the basic units of matter.

Answer:

**: matter

1. Explanation for Q2: John Dalton’s atomic theory is known as Dalton’s Atomic Theory.