Chemistry - Quiz 2: Golden years to periodic table

Which atomic number corresponds to the element which is most stable?

36

What is a common characteristic of the transitions elements?

The next to outermost electron shell begins to fill up.

Complete the sentence. Select all that apply. In the vertical columns of the periodic table:

atomic weight increases from top to bottom the number of shells increases from top to bottom

Complete the sentence. Select all that apply. The last element in periods 2-7 always has:

the properties of a noble gas eight electrons in the outermost energy level

Periodicity is best defined as:

the repeating nature of physical and chemical properties with increasing atomic number

How many electrons will a true metal generally have in its outer energy level?

1 - 2

Match these items. Match the items in the left column to the items in the right column. 1. Dalton 2. Curie 3. Schrödinger 4. Thomson 5. Bohr 6. Rutherford

1 = father of atomic theory 4 = discovered electron 3 = expressed particles by wave equation 2 = research on radioactivity 6 = "open spaces" model 5 = applied quantum theory to atoms

The atomic number of the element which does not usually form compounds because its outermost shell is full is:

18

Movement of electrons about a central nucleus is a concept by:

Bohr

Which element in period 4 is the most chemically active non-metal?

Br

Each period of the periodic table ends with:

group VIIIA elements

The number of positive charges in the nucleus of an atom is equal to:

its atomic number

An atom is most stable when it has eight electrons in its outermost energy level. This is a statement of the ____ rule

oclet

Most of the mass of an atom is made up of:

the protons and neutrons