Periodic Trends

Which statement correctly and completely identifies a trend?

• 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-PS1-1

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

Which of the following is NOT a trend that varies periodically in the periodic table?

• Electronegativity

• Ionization energy

• Symbols of elements

• Atomic radius

The atomic radius across period

• decrease from left to right

• Increase from left to right

• decrease from right to left

• stay the same

Tags

NGSS.HS-PS1-1

Match the trend with the correct definition

• Electronegativity

• The energy required to remove an electron from an atom.

• Reactivity

• The strength of attraction between an atom's nucleus and the electrons in that atom.

• Ionization Energy

• The likelihood that that an atom will participate in a chemical reaction

• Atomic Radius

• The distance from the center of an atom and the furthest electron. This is a measure of an atom's size.

Tags

NGSS.HS-PS1-1

Match the following periodic trends to the element with the highest value for that trend.

• cesium

• Atomic radius

• fluorine

• Ionization Energy

• helium

• Electronegativity

Tags

NGSS.HS-PS1-2

As you move down a Group on the periodic table, what happens to the size of the atoms?

• they stay the same

• they get larger

• they get smaller

As you move across a row on the periodic table, what generally happens to the atomic radius?

• it decreases

• it increases

• it stays the same

Which of the following atoms has the greatest atomic radius?

• nitrogen

• phosphorus

• potassium

• cesium

Tags

NGSS.HS-PS1-1

Which periodic group has the smallest atomic radius?

• Alkali metals

• Halogens

• Noble Gases

• Transition metals