Unit 1

Question 0

Which property describes how much energy must be added to an atom to remove an outermost electron?

Answer 0

Ionization energy

Question 1

According to the modern concept of the atom, which are located in the nucleus of an atom?

Answer 1

Protons and neutrons

Question 2

According to __________ periodic table, the physical and chemical properties of elements are periodic functions of their atomic weights

Answer 2

Dmitri Mendeleev’s

Question 3

How do you find the atomic mass of an element?

Answer 3

You have to multiply the atomic weight of an atom (in amu, or atomic mass units) by the percent abundance expressed as a decimal.

Question 4

Why do elements in the same group have the same properties?

Answer 4

They have the same amount of valence electrons

Question 5

Electronegativity definition:

Answer 5

Tendency of an atom to attract electrons to itself when combined with another atom