Unit 3 Atomic Structure/Periodic Table

Atoms of the same elements with different numbers of neutrons are called

How many valence electrons does Carbon have?

__ Is the most reactive nonmetals

A certain atom has 27 protons, 27 electrons, and 31 neutrons. Its mass number is

The Bohr model represents

Horizontal rows of the periodic table are called

The smallest particle in which an element can be divided and still have the same properties is

Group 1 is known as

Most of the elements on the periodic table are

The elements to the left of the zigzag line (stairstep) on the periodic table are called

The charge of the neutron is

The atomic mass represents

Which is the BEST description for the structure of an atom?

Group 18 is known as the

Which scientist was the first to arrange the periodic table?

Group 17 is known as

Most metals are described as

Transitional metals on the periodic table are which groups?

Elements in each vertical column on the periodic table usually have similar properties called

Which is TRUE?

Lewis Dot Diagrams are used to represent

The __ is the positively charges subatomic particle of the atom

The atomic number is equal to the number of

Particles of matter that make up protons and neutrons

Which group does not combine with other elements?

Groups or Families are similar, not identical, by the elements ___

Group 2 is the family known as

The modern periodic table is arranged by

Where are electrons likely to be found?

Which has the least mass?

The weighted average of the masses of the element's isotopes is ____

Subatomic particles that are on the outer most energy level of an atom are called

Why do the noble gases NOT form compounds?

Transitional metals on the table are

The second group of the rare-earth metals are known as

Which element is the most important element with all living things?

The periods on the periodic table indicate which of the following information?

The element Boron from the periodic table contains the # 10.811. What is this number called?

Which statement is true about isotopes of the same element?

The _ of the atom is composed of protons and neutrons

How many electrons are needed in the outer energy levels of most atoms for it to be stable?

Which groups of elements are mostly synthetic or man-made?

Each inner energy level of an atom has a maximum number of __ it can hold

The charge of a proton is

Where are the metalloids (semi-metals) located on the periodic table?