Atomic Structure PPT Worksheet

Which of the following is a subatomic particle?

• Proton

• Molecule

• Compound

• Element

The subatomic particle with a positive charge is called a _______.

• Electron

• Neutron

• Proton

What did Democritus believe about the nature of matter?

• It is made of water

• It is made of fire

• It consists of extremely small particles that cannot be divided

• It is made of air.

Democritus called the extremely small particles that make up matter 'atoms' because the word 'atomos' means ______.

• divisible

• uncut

• large

• visible

Which scientist developed a theory to explain why elements in a compound always join the same way?

• Albert Einstein

• John Dalton

• Isaac Newton

• Niels Bohr

According to John Dalton's theory, all atoms of the same element have the same ______, and atoms of different elements have different masses.

• color

• size

• mass

• shape

Which model of the atom depicts atoms as solid spheres?

• Rutherford's Model

• Bohr's Model

• Dalton's Model

• Thomson's Model

In Dalton's model, each type of atom is represented by a tiny, solid sphere with different ______.

• colors

• shapes

• masses

• sizes

What did Thomson use to learn more about atoms?

• Magnetic field

• Electric current

• Chemical reactions

• Heat

Thomson's model of the atom is known as the '____ pudding' model.

• Apple

• Plum

• Cherry

• Banana