PERIODIC TABLE OF ELEMENTS
1. A substance that is made of only one type of atom is called an ………………………..
2. The atoms of an element can be identified by their atomic number, which is equal to the number of
………………….. (or positively charged particles) found inside the atom’s nucleus. Each
element on the Periodic Table has a …………………. atomic number.
3. There are 18 ………………… (or vertical columns) of elements and 7 ……………….. (or
horizontal rows) of elements found on the periodic table.
4. All elements in the same row have the same number of …………………… surrounding the
nucleus of their atoms, while all elements in the same column have similar properties and the same
number of …………………… (outermost) electrons.
5. All elements on the periodic table are arranged by their atomic number, which ……………… as
you move across the table from left to right and top to bottom.
6. The mass number of an element is equal to the total number of ………………………. and
…………………….. found inside the ……………….. of an atom.
7. The number of neutrons inside the nucleus can
…………………………. from the ……………………. .
be
found
by
subtracting
the
8. The atoms of each element found on the Periodic Table are balanced and have no overall electrical
charge, which means that they must have the …………. number of ……………….. (positive
charges) and ………………….. (negative charges).
9. The most ……………… elements on the Periodic Table are found in Groups one (ALKALI
METALS) and seventeen (HALOGENS).
10. The elements listed in Group 18 are called NOBLE GASES because their atoms have a ………..
set of electrons in their outermost energy levels, which makes them stable and …………………..
11. Most elements on the Periodic Table are ……………… and include examples such as copper,
gold, silver, iron, and aluminum. Most of these elements are …………….. at room temperature,
shiny in appearance. These elements also tend to be very good …………………….. of heat and
electricity.
12. Elements on the Periodic Table that have properties that are opposite of metals are called
………………….. and includes examples like oxygen, nitrogen, carbon, chlorine, and sulfur.
Most of these elements are ……..…….. or ……………. at room temperature, dull (not shiny) in
appearance. These elements are also …………….. conductors of heat and electricity.
13. The idea of arranging the elements in the periodic table according to their chemical and physical
properties is attributed to …………………………….
14. The principle that states that the physical and chemical properties of the elements are periodic
functions of their atomic numbers is ………………………………..…..
1.
5.
9.
13.
17.
21.
25.
mass number
valence
solids
protons
elements
unreactive
Mendeleev
2.
6.
10.
14.
18.
22.
26.
protons
metals
electron shells
atomic number
electrons
periods
poor
3.
7.
11.
15.
19.
23.
27.
protons
conductors
different
full
same
increases
gases
4.
8.
12.
16.
20.
24.
28.
reactive
nucleus
nonmetals
neutrons
groups
solids
the periodic law