Chemistry Diagnostic Test

Front

What is an alkaline earth metal?

Back

Alkaline earth metals are a group of elements in Group 2 of the periodic table, characterized by having two valence electrons. Examples include magnesium and strontium.

Front

Which element has the largest atomic radius: cobalt, nickel, rhodium, or palladium?

Back

Rhodium has the largest atomic radius among these elements.

Front

How are elements arranged in the periodic table?

Back

Elements in the periodic table are arranged by increasing atomic number.

Front

How many valence electrons does oxygen have?

Back

Oxygen has 6 valence electrons.

Front

What is the balanced equation for Al + HCl -> H2 + AlCl3?

Back

The balanced equation is 2Al + 6HCl -> 3H2 + 2AlCl3.

Front

What are the properties of alkaline earth metals?

Back

Alkaline earth metals are shiny, silvery-white, and somewhat reactive at standard temperature and pressure.

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically and its bonding behavior.

Front

What is the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.