The Periodic Nature of Elements

What does the atomic number of an element represent?

• The number of neutrons in the nucleus

• The total number of electrons

• The number of protons in the nucleus

• The number of electrons in the outer shell

What do elements in the same group of the periodic table have in common?

• The same atomic mass

• The same atomic number

• The same number of electron shells

• Similar chemical properties

How does the atomic radius change as you move down a group in the periodic table?

• It fluctuates randomly

• It decreases

• It remains the same

• It increases

What happens to ionization energy as you move from left to right across a period?

• It decreases

• It first increases then decreases

• It increases

• It remains constant

Why is understanding the periodic table important for scientists?

• It helps in determining the atomic structure and predicting element behavior

• It provides a list of all known compounds

• It shows the history of element discovery

• It is used to calculate the weight of elements