periodic table terms and trends

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Vertical columns of elements are known as ________________- Elements in a column have the same number of ______________ .

• groups, valence electrons

• periods, neutrons

• groups, protons

• gangs, members

Which element is located in period 4?

• Zirconium (Zr)

• Silicon (Si)

• Beryllium (Be)

• Iron (Fe)

Which is a halogen?

• Helium

• Chlorine

• Oxygen

• Neptune

Group II on the Periodic Table contains the _____________________________. They form ions with a charge of _________________.

• alkali metals, -2

• alkaline earth metals, +2

• halogens, -1

• noble gases, 0

A Group IIIA element has ____ electron(s) in it's outermost level and when it forms an ion it _________________________.

• 1, loses 1 electron

• 3, loses 1 electron

• 3, loses 3 electrons

• 3, gains 3 electrons

Which of the following elements has the LARGEST atomic radius?

• K

• Na

• Al

• N

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 more electrons.

Ionization energy (and electronegativity) __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases

• increases, increases

• increases, decreases

• decreases, decreases

Francium (Fr) has the lowest ionization energy in Group 1 because -

• it has the smallest number of valence electrons

• it has the greatest atomic mass

• it has the greatest number of protons, so it attracts its electrons the strongest

• its 1 valence electron is very far from the nucleus, so little energy is needed to remove it