What is the chemical symbol of Potassium?

• K

• P

• Pt

• Po

What is the chemical symbol of the element Sodium?

• S

• Sn

• Na

• Si

What is the chemical symbol of the element Nitrogen?

• Ne

• N

• Ni

• No

How many atoms are there in the chemical formula of caffeine? (number only)

C₈H₁₀N₄O₂

Tags

NGSS.MS-PS1-1

How many atoms are there in the chemical formula of lead (II) phosphate? (number only)

Pb₃(PO₄)₂

Tags

NGSS.MS-PS1-1

Match the following elements to their group on the periodic table

• noble gases

• Arsenic

• alkali metals

• Krypton

• transition metals

• Magnesium

• alkaline earth metals

• Rubidium

• metalloids

• Tungsten

The halogens values of electronegativity (ability to attract electrons) are as follows:

F - 4.0, Cl - 3.0, Br - 2.8, I - 2.5, and At - 2.2

What can we infer from this data?

• Electronegativity increases down a group

• Electronegativity decreases down a group

• Electronegativity increases across the table

• Electronegativity decreases across the table

Ionization energy (the energy required to remove an electron) increases as we move across the table and decreases as we go down a group. Which element would likely have a higher ionization energy than phosphorus?

• Chlorine

• Arsenic

• Silicon

• Aluminum

Tags

NGSS.HS-PS1-1

Atoms with the largest radius (size) can be found on the left side and bottom of the table. Arrange the following elements in order from smallest to largest.

• cobalt

• fluorine

• barium

• calcium

Nonmetals can be found on the upper right side of the periodic table, are the most electronegative elements, have the highest ionization energies, make negative ions, and are the smallest elements.

• TRUE

• FALSE

Tags

NGSS.HS-PS1-1