Identify the naturally occurring elements in Group 7A — fluorine, chlorine, bromine, iodine, and astatine — as metals, nonmetals, or metalloids.

Identify the set that contains a metal, a nonmetal, and a metalloid in this order. 

Match the element with the family name 

            _____ sodium                        A.  Halogen

            _____ chlorine                       B.  Transition metal

            _____  iron                             C.  Alkali metal

            _____ xenon                          D.  Noble gas

Fill in the blank

________ are similar for the elements in the same group of the periodic table. 

Identify which classification each element belongs to:

A. Alkali Metal

B. Alkaline Earth Metal

C. Pnictogen

D. Chalcogen

E. Halogen

F. Noble Gas

G. Transition Metal

H. Inner Transition Metal

I. Representative Element

J. Lanthanide

K. Actinide

1) Mg

2) H

3) Cl

4) No

5) P

6) Fe

Which element is NOT typically found as a diatomic molecule in nature?

Which property of elements in the same group helps predict their behavior in chemical reactions?

Which mass ratio would you expect for a sample of carbon dioxide (CO2) given atomic masses: C = 12, O = 16?

How does the Law of Definite Proportions help in verifying the purity of a chemical compound?

What was the significance of Joseph L. Proust's experiments in the late 18th century?

In Rutherford's gold-foil experiment, it was expected that the α-particles should pass through the sheet of gold foil with little to no deflection. What was observed instead?

If the distance between two consecutive crests of a wave is 5 meters, what is the wavelength of the wave?

Given the speed of light is constant, what happens to the wavelength of light if its frequency is doubled?

A photon has a frequency of 6 x 10^14 Hz. If the speed of light is 3 x 10^8 m/s, what is the energy of the photon in joules, given Planck's constant is 6.626 x 10^-34 Js?

The UV (ultraviolet light) lies on the left of the electromagnetic spectrum. While infrared (IR) lies on the right. Which statement is true?

(1) the wavelength of IR light is lower than UV light

(2) the frequency of IR light is lower than UV light

(3) the energy of IR light is lower than UV light

(4) the energy of IR light and UV light are the same

Based on the Bohr atomic theory, the movement of an electron from one energy level to another closer to the nucleus

Determine the number of subshells in the following: first shell, second shell, and third shell.

How many orbitals are present in the second shell? What about the third shell?

Consider the elements lutetium through mercury. Identify:
i) If the elements are nonmetals, metalloids, or metals.
ii) The class of elements they belong.
iii) The subshell being filled with electrons in the series.