Chemistry 1C Assessment

Does electronegativity increase or decrease as atomic size decreases?

• Increases

• Decreases

• Neither

Which scientist developed the "planetary model" of the atom?

• Dalton

• Bohr

• Rutherford

• Heisenberg

What is the name of the ionic compound Ba₃N₂?

• Barium nitrate

• Barium nitrogen

• Barium nitrite

• Barium nitride

What is the electron configuration of an oxygen atom?

• 1s² 2s² 1p⁴

• 1s² 2p⁶

• 2s² 2p⁴

• 1s² 2s² 2p⁴

Tags

NGSS.HS-PS1-1

What periodic Trend is this diagram correctly identifying?

• Atomic Radius

• Electronegativity

• Charge

• Energy Levels

Tags

NGSS.HS-PS1-2

The figure shows a cathode ray tube. In 1897, J.J. Thomson used a device like the one shown to discover that cathode rays were streams of -

• photons

• electrons

• protons

• ions

Which statement is true of the alkaline earth elements, Group 2A on the Periodic Table?

• They are found in nature as free elements.

• They readily lose two valence electrons.

• Their electron configuration ends with s¹.

• They have an oxidation state of +1.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What causes the atomic radius of the elements to decrease across Period 3 from left to right?

• The shielding effect

• The decreasing metallic character

• The increasing nuclear charge

• The increasing number of neutrons

An unknown element was recently discovered and found to have the characteristics shown in the table.

In which group does the unknown element most likely belong?

• Alkali Metals

• Alkaline Earth Metals

• Halogens

• Transition Metals

Tags

NGSS.HS-PS1-1

What is the name of the compound FeCl₃?

• Iron chloride

• Iron trichloride

• Iron tetrachloride

• Iron (III) chloride