periodic table and periodic trends

Identify the first alkali metal.

Positive ions are called

What type of ions do nonmetals form?

Which of the following forms ions that are larger than their atoms?

Arrange the following elements in order of increasing atomic size: S, Ca, K, F

Who also developed a periodic table by arranging the elements in order of increasing atomic mass?

Which of the following is NOT a property of metals?

The energy needed to remove an electron from an atom in the gas state is the

Classify Sm.

Who discovered atomic numbers and ordered the periodic table using them?

What group has electron configurations that end in np⁵?

Classify the element with the electron configuration: 1s²2s²2p⁶3s²3p⁶4s²3d⁵

Going down a group, what happens to the nuclear charge and shielding?

Classify Ge.

Identify the last metal in the third period.

The modern periodic table is arranged in order of increasing

Arrange the following elements in order of increasing electronegativity: O, S, Sr, Mg

How many valence electrons does selenium (Se) have?

The attraction for the shared electrons in a bond is the

Who proposed the "law of octaves?"

Which element has the highest ionization energy?

The rows in the periodic table are called

Going across a period, what happens to the nuclear charge and shielding

The fourth halogen is

Who tried to organize the elements into triads?

Which element has the highest electronegativity?

Arrange the following elements in order of increasing ionization energy: P, N, As, Sb

The noble gases are group

Who is given the most credit for developing the periodic table because he predicted unknown elements?