Atoms and the Periodic Table

Question 1

The two most common alkali metals are:

Accepted Answer

sodium and potassium

Question 2

Radioactive isotopes called _______ can be used to detect some medical problems

Accepted Answer

tracers

Question 3

Elements in a vertical column of the periodic table

Accepted Answer

have similar properties

Question 4

The elements are organized according to the number of :

Accepted Answer

protons

Question 5

To make synthetic elements scientists use powerful machines called

Accepted Answer

particle accelerators

Question 6

Neutrons have a charge that is:

Accepted Answer

neutral

Question 7

Which group of elements shares characteristics with both metals and nonmetals?

Accepted Answer

semi-metals

Question 8

a piece of paper will provide protection from

Accepted Answer

alpha particles

Question 9

Who discovered how the elements are organized?

Accepted Answer

Dimitri Mendeleev

Question 10

The horizontal rows are called:

Accepted Answer

Periods

Question 11

All of these are groups of elements on the periodic table, except:

Accepted Answer

diatomic atoms

Question 12

Electrons are found in the :

Accepted Answer

electron cloud

Question 13

The Noble Gases Group is :

Accepted Answer

unreactive

Question 14

Why was Mendeleev's periodic table not complete?

Accepted Answer

Some of the elements were not discovered yet.

Question 15

Hydrogen atom typically has:

Accepted Answer

only one proton and one electron

Question 16

Most of the periodic table is:

Accepted Answer

metals

Question 17

Electrons have:

Accepted Answer

no real mass

Question 18

Protons have a charge that is :

Accepted Answer

positive

Question 19

The letters in the middle of the periodic square on the periodic table are called the:

Accepted Answer

atomic symbol

Question 20

If Lithium has 3 protons and 4 neutrons, then the atomic number is:

Accepted Answer

3

Question 21

The nucleus contains the

Accepted Answer

Protons and neutrons

Question 22

The Lanthanides and Actinides are taken out of the periodic table because:

Accepted Answer

It makes it easier to use in books and on screens.

Question 23

Elements with the same number of protons but a different number of neutrons are called

Accepted Answer

isotopes

Question 24

Most metals have all of the following properties EXCEPT:

Accepted Answer

liquid at room temp

Question 25

The most common element in the universe is:

Accepted Answer

hydrogen

Question 26

The decimal number at the bottom of the rectangles on the periodic table are called the:

Accepted Answer

atomic mass

Atoms and the Periodic Table

Questions 26

Atoms and the Periodic Table

Questions 26