Question

group
halogen
henry moseley
lanthanoids
mendeleev
metals
metalloid
noble gas
nonmetals
p sublevel
period
periodic law
periodic table
s sublevel
transition metals
valence electrons

the known elements are arranged in a chart - like form known as the
1.__. 2.__ developed the first arrangement of the elements in

1. he proposed that if the elements were arranged in order of

increasing 3.____, there would be a repetition of their properties

when arranged in this manner, elements with similar properties
would show up at regular intervals. this became known as the
4.__. around 1913, a young scientist named 5.__ suggested
that the elements be arranged in order of increasing 6.____, which is
the arrangement still used today. the modern periodic table is
arranged in rows and columns. a horizontal row is also known as a
7.__, and a vertical column is known as a 8. or 9.__.
elements that have the same number of 10.____ will be found in the
same group. each element would like to achieve 11.____ electrons
in the valence shell - called the octet rule.

certain columns and areas of the periodic table have been
assigned specific names. groups 3 - 12 contain an area we call
12.____. these are elements whose valence electrons are filling the
13.____ sublevel. rows 6 and 7 contain 2 other sets of elements
that are placed at the bottom of the periodic table. these are known
as the 14.__ and 15.__ section. these elements have valence
electrons filling the 16.____ sublevel. more specifically, the elements
from period 6 are called 17.____ and the ones from period 7 are
called 18.____. certain groups of the periodic table also have
specific names. for instance, elements in column 1 are also called
19.__. the elements in column 2 are called 20.__. the element
in column 17 are called 21.____. the elements in column 18 are
called 22.____. the elements of column 1 and 2 have valence
electrons filling the 23.____ sublevel. the elements in column 13 -
have valence electrons filling the 24.____ sublevel.

the elements on the right side of the periodic table are classifie
elements on the left side of the table are classifie
have characteristics

Explanation:

To solve this fill - in - the - blank problem about the periodic table, we use our knowledge of the history and structure of the periodic table:

Step 1: Analyze blank 1

The known elements are arranged in a chart - like form called the Periodic Table. This is a fundamental concept in chemistry, where the periodic table is the standard way to organize elements.

Step 2: Analyze blank 2

In 1869, Mendeleev developed the first arrangement of the elements. He is widely recognized as the scientist who created the first version of the periodic table.

Step 3: Analyze blank 3

Mendeleev proposed that if elements were arranged in order of increasing atomic mass, their properties would repeat. At that time, atomic mass was the key property used for arrangement.

Step 4: Analyze blank 4

The repetition of properties at regular intervals when elements are arranged in a certain order is known as the Periodic Law.

Step 5: Analyze blank 5

Around 1913, Henry Moseley suggested a new way to arrange the elements.

Step 6: Analyze blank 6

Moseley suggested arranging elements in order of increasing atomic number, which is the modern basis for the periodic table.

Step 7: Analyze blank 7

A horizontal row in the periodic table is called a Period.

Step 8: Analyze blank 8 and 9

A vertical column in the periodic table is known as a Group or Family.

Step 9: Analyze blank 10

Elements with the same number of Valence Electrons are found in the same group. Valence electrons determine the chemical properties of an element.

Step 10: Analyze blank 11

Each element wants to achieve 8 (eight) electrons in the valence shell (octet rule, except for some elements like hydrogen and helium).

Step 11: Analyze blank 12

Groups 3 - 12 contain the Transition Metals.

Step 12: Analyze blank 13

Transition metals have valence electrons filling the d sublevel.

Step 13: Analyze blank 14 and 15

Rows 6 and 7 have elements at the bottom known as the Lanthanoids and Actinoids (in some sources, Actinides) section.

Step 14: Analyze blank 16

These elements (Lanthanoids and Actinoids) have valence electrons filling the f sublevel.

Step 15: Analyze blank 17

Elements from period 6 in this bottom section are called Lanthanoids.

Step 16: Analyze blank 18

Elements from period 7 in this bottom section are called Actinoids (or Actinides).

Step 17: Analyze blank 19

Elements in column 1 are called Alkali Metals.

Step 18: Analyze blank 20

Elements in column 2 are called Alkaline Earth Metals.

Step 19: Analyze blank 21

Elements in column 17 are called Halogens.

Step 20: Analyze blank 22

Elements in column 18 are called Noble Gases.

Step 21: Analyze blank 23

Elements in column 1 and 2 have valence electrons filling the s sublevel.

Step 22: Analyze blank 24

Elements in column 13 - 18 have valence electrons filling the p sublevel.

Answer:

s:

1. Periodic Table
2. Mendeleev
3. atomic mass
4. Periodic Law
5. Henry Moseley
6. atomic number
7. Period
8. Group
9. Family
10. Valence Electrons
11. 8 (eight)
12. Transition Metals
13. d
14. Lanthanoids
15. Actinoids (Actinides)
16. f
17. Lanthanoids
18. Actinoids (Actinides)
19. Alkali Metals
20. Alkaline Earth Metals
21. Halogens
22. Noble Gases
23. s
24. p