Atoms and the P.T Common Assessment

Atoms in Group 18 elements are inert (chemically unreactive) because __________________________.

• they have filled inner energy levels.

• they have no valence electrons.

• they combined to form molecules.

• they have a full valence shell.

Tags

SPS1.b

The number of valence electrons in Group 2 is ________________ and their oxidation number is ________________.

• 2, -2

• 8, +8

• 18, +2

• 2, +2

Tags

SPS1.b

The protons and neutrons of three carbon isotopes are shown. Which BEST describes the difference between carbon-12 and carbon-14?

• Carbon-12 has two less protons than carbon-14.

• Carbon-12 has one more neutron than carbon-14.

• Carbon-14 has one less proton than carbon-12.

• Carbon-14 has two more neutrons than carbon-12.

Tags

SPS1.a

The Periodic Table is shown. Which list consists of elements that have the MOST similar chemical properties?

• Mg, Al, and Si

• K, Ca, and Ga

• Mg, Ca, and Ba

• K, Al, and Ni

Tags

SPS1.c

On the periodic table, the elements in the columns have the same

• density.

• atomic mass.

• physical properties.

• number of valence electrons.

Tags

SPS1.c

What is true about the number of protons in carbon (C)?

• The number of protons in carbon (C) is equal to its atomic mass.

• The number of protons in carbon (C) can be determined by adding its atomic number to its atomic mass.

• The number of protons in carbon (C) can be determined by subtracting its atomic number from its atomic mass.

• The number of protons in carbon (C) is equal to its atomic number.

Tags

SPS1.a

The atom of this element has 5 valence electrons and 2 energy levels.

• strontium

• nitrogen

• phosphorous

• barium

Tags

SPS1.b

The diagram shows a basic model of a neutral nitrogen atom. Use the diagram to answer any questions that follow. Where in the atom could a proton be found?

• W or X

• X or Y

• Y or Z

• Z or W

Tags

SPS1.a

How many neutrons are in Carbon-14?

• Six

• Eight

• Fourteen

• Twenty

Tags

SPS1.a

The Periodic Table of Elements is shown. Which element has chemical properties that are MOST similar to those of calcium?

• Sr

• K

• Co

• N

Tags

SPS1.c