The following is a periodic table below
All the letters are in squares
The S = an empty square
13 Colums in total
Questions:
1. Which pair of eleemtns has the same number of valence electrons? clueless
2. What pair of elements is in the same period? D and R
3. Which pair of elemetns is in the same family? K and F
4. Which element has the smallest atomic number??
5. IF the atomic number of element D is 20 then wha tis the atomic number of R? HELP CLUELESS
K S
S S S S J S S
F S S S S S S
S S S D S S R S S S S S S
1. ARe K,F in the same family? Doesn't that make them the same valence?
4. K has the smallest atomic number. Look at a real periodic table.
5. Add three.
To answer the questions, let's analyze the given periodic table.
1. Which pair of elements has the same number of valence electrons?
The valence electrons of an element are the electrons in its outermost energy level. Looking at the periodic table, we can observe that the elements D and R are in the same row and have the same number of empty squares around them. Therefore, elements D and R have the same number of valence electrons.
2. What pair of elements is in the same period?
A period in the periodic table refers to a horizontal row. In this case, element D and element R are both in the fourth row (period), so they are in the same period.
3. Which pair of elements is in the same family?
A family in the periodic table refers to a vertical column, also known as a group. By examining the given periodic table, we can see that element K and element F are in the same column (family) labeled as "S S," so they are in the same family.
4. Which element has the smallest atomic number?
The atomic number of an element represents the number of protons in its nucleus. In the periodic table, the elements are arranged in increasing order of atomic numbers from left to right and top to bottom. By examining the table, we find that element K has the smallest atomic number since it appears at the top-left corner.
5. If the atomic number of element D is 20, what is the atomic number of R?
To determine the atomic number of element R, we need to understand the pattern of atomic numbers in the periodic table. Since the elements in the periodic table are arranged in a specific order, we can count the number of squares between element D and element R to find their atomic number difference.
Based on the given periodic table, there are five squares between D and R:
K S
S S S S J S S
F S S S S S S
S S S D S S R S S S S S S
Since the atomic number of D is given as 20, we can calculate the atomic number of R by adding the number of squares between them:
Atomic number of R = Atomic number of D + Number of squares between D and R
= 20 + 5
= 25
Therefore, the atomic number of element R is 25.