Periodic Table of Elements

Who is credited with the creation of the first periodic table of elements?

• Isaac Newton

• Albert Einstein

• Marie Curie

• Dmitri Mendeleev

How many periods are there in the periodic table?

• 7

• 10

• 5

• 12

What is the name given to the vertical columns in the periodic table?

• groups

• periods

• blocks

• rows

What is the name given to the horizontal rows in the periodic table?

• periods

• blocks

• groups

• categories

What does the atomic number of an element represent?

• Mass of the atom in atomic mass units

• Number of electrons in the outer shell of an atom

• Total number of neutrons in an atom

• Number of protons in the nucleus of an atom

How many valence electrons does an element in Group 17 have?

• 5

• 7

• 10

• 8

Draw the atomic diagram of Carbon (C) showing the arrangement of protons, neutrons, and electrons.

• Protons are located outside the nucleus

• Protons and neutrons are located in the nucleus, while electrons orbit around the nucleus in energy levels.

• Neutrons are negatively charged particles

• Electrons are located in the nucleus

What is the maximum number of electrons that can occupy the first energy level of an atom?

• 8

• 2

• 4

• 6

How many valence electrons does an element in Group 2 have?

• 4

• 2

• 6

• 8

Explain the significance of valence electrons in determining the chemical properties of an element.

• Valence electrons have no impact on chemical properties

• Valence electrons play a crucial role in determining the chemical properties of an element by influencing its reactivity and bonding behavior.

• Valence electrons determine the color of an element

• Valence electrons control the melting point of an element