Review - Test 1 3rd 6wks

Front

What happens to the size of atoms as you move across the periodic table and why?

Back

Atoms tend to get smaller because they have more protons, which increases the positive charge in the nucleus and pulls the electrons closer.

Front

Who is credited with the discovery of electrons?

Back

J.J. Thompson is credited with the discovery of electrons.

Front

What trend occurs in atomic size as you move down the periodic table and what causes it?

Back

Atoms get bigger as you move down the periodic table because they have more energy levels.

Front

Which type of electromagnetic radiation carries the greatest amount of energy?

Back

Gamma rays carry the greatest amount of energy.

Front

Who proposed that electrons travel in fixed orbits around the nucleus?

Back

Niels Bohr proposed that electrons travel in fixed orbits.

Front

What is the relationship between the number of protons and the atomic size across a period?

Back

As the number of protons increases across a period, the atomic size decreases due to increased nuclear charge.

Front

What is the significance of energy levels in atomic structure?

Back

Energy levels determine the distance of electrons from the nucleus and influence the size of the atom.

Front

How do gamma rays compare to other forms of electromagnetic radiation in terms of energy?

Back

Gamma rays have higher energy than other forms of electromagnetic radiation, such as X-rays, ultraviolet, visible light, infrared, and radio waves.

Front

What model of the atom did J.J. Thompson propose?

Back

J.J. Thompson proposed the 'plum pudding' model of the atom, where electrons are embedded in a positively charged 'soup'.

Front

What is the main idea behind Bohr's model of the atom?

Back

Bohr's model suggests that electrons occupy fixed orbits around the nucleus, with specific energy levels.