Periodic Table and Periodic Trends

As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.

• the atoms have less mass

• the atoms have more protons.

• the atoms have less electrons.

Tags

NGSS.HS-PS1-1

The atom with the largest atomic radius in Group 18 is ____.

• Ar

• He

• Kr

• Rn

Which of the following elements has a lower ionization energy than Scandium (Sc)?

• Helium (He)

• Titanium (Ti)

• Calcium (Ca)

• Magnesium (Mg)

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has a higher electronegativity than arsenic (As)?

• Chlorine (Cl)

• Neon (Ne)

• Antimony (Sb)

• Germanium (Ge)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement correctly and completely identifies a trend found on the periodic table?

• Atomic radius decreases across a period and increases down a group.

• Electronegativity decreases across a period and decreases down a group.

• Ionization energy increases across a period and increases down a group.

• Ionic radius increases across a period and increases down a group.

Tags

NGSS.HS-PS1-2

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases

• increases, increases

• increases, decreases

• stays the same, increases

Tags

NGSS.HS-PS1-1

Which color on the image of the periodic table corresponds with the noble gases.

• red

• black

• blue

• orange

Tags

NGSS.HS-PS1-1

Mendeleev first ordered the periodic table of elements by increasing

• atomic number

• atomic mass

• atomic symbol

• atomic weight

Which family of elements reacts violently with water and exposure to oxygen?

• alkali metals

• alkaline earth metals

• lanthanides

• actanides

• transition metals

The periodic table is mostly comprised of what type of element?

• Metals

• Nonmetals

• Metalloids