Chemistry
Periodic Table
Grade 10 · High School
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- Question 1 of 20Easy
Elements in the same group of the periodic table have the same ...
- Question 2 of 20Easy
Within a period from left to right, elements are arranged by increasing ...
- Question 3 of 20Easy
Group IA in the periodic table is known as the ... metals.
- Question 4 of 20Easy
Group VIIIA elements, which are very stable and rarely react, are called ...
- Question 5 of 20Easy
Sodium is located in ...
- Question 6 of 20Easy
An element with electron configuration 2, 8, 7 is in group ...
- Question 7 of 20Medium
The element with atomic number 17 (chlorine) is located in ...
- Question 8 of 20Medium
Which of the following elements is a halogen?
- Question 9 of 20Medium
An element with electron configuration 2, 8, 2 lies in group and period ...
- Question 10 of 20Medium
The lightest noble gas is ...
- Question 11 of 20Medium
Among the following elements, which is a nonmetal?
- Question 12 of 20Medium
Within a period from left to right, the atomic radius tends to ...
- Question 13 of 20Medium
Calcium has atomic number 20. It is located in ...
- Question 14 of 20Medium
Halogens are very reactive because ...
- Question 15 of 20Hard
The element with atomic number 19 is ...
- Question 16 of 20Hard
Down the alkali metal group, the reactivity of the elements ...
- Question 17 of 20Hard
An element X lies in group IIIA, period 3. Its atomic number is ...
- Question 18 of 20Hard
The element with atomic number 9 most easily forms an ion with charge ...
- Question 19 of 20Hard
An ion has electron configuration 2, 8, 8. The atomic number of X is ...
- Question 20 of 20Hard
The pair of elements with the most similar chemical properties is ...