Periodic Table

The periodic table is arranged in order of

• atomic mass

• atomic number

• number of neutrons

• number of isotopes

Which of the following elements are classified as metals?

• Al

• S

• Si

• Na

As the atomic number increases in group 2, the atomic radius (a)   (increases or decreases)

A student finds a sample of an element and finds that it conducts electricity, is malleable, and has a high melting point. Which of the following could be the identity of the sample?

• Bromine

• Argon

• Sulfur

• Magnesium

The bar graph above represents four elements and their respective ionization energies. Based on the organization of the modern periodic table, how would these elements be found on the periodic table?

• They are in the same period with W being furthest left.
• They are in the same period with W being furthest right.
• They are in the same group with W being furthest to the bottom.
• They are in a diagonal line with W being at the bottom right.

Tags

NGSS.HS-PS1-1

Which of the following sequences corresponds to a correct trend in ionization energy?

• F > Cl > Br > I

• Sr > Ca > Mg > Be

• Rb > K > Na > Li

• Rb > Sr > I > Xe

Which element has the greatest attraction for an electron in a chemical bond?

• Al

• Cl

• Sn

• Br

The atomic radius of a neutral atom is larger than its ionic radius. What could be the identify of this element?

• Oxygen

• Chlorine

• Calcium

• Nitrogen

An element gains an electron. Which statement best explains the resulting ion?

• It has a negative charge and is larger than the atom.

• It has a negative charge and is smaller than the atom.

• It has a positive charge and is larger than the atom.

• It has a positive charge and is smaller than the atom.

Which pair of elements will have the most similar chemical properties?

• Na and Mg

• Ag and Au

• Cl and Br

• O and N