eurekami

Electron shells and the periodic table

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-PS1-1 · England: KS4 Combined Science: Atomic structure and the periodic table

Name

Date

Score/ 16

Question 1
How many electrons does an atom of fluorine (atomic number 9) have in its outer shell?
Answer
2
Question 2
Boron has atomic number 5. What is its electronic structure?
coral + = proton · grey = neutron · purple − = electron
- A. 1,4
- B. 2,2,1
- C. 2,3
- D. 2,4
3
Question 3
Why do elements in the same group react in similar ways?
- A. They have the same number of electrons in their outer shell
- B. They have the same mass
- C. They have the same number of neutrons
- D. They were discovered at the same time
Question 4
How many electrons does an atom of silicon (atomic number 14) have in its outer shell?
Answer
5
Question 5
Aluminium (aluminum) has atomic number 13. What is its electronic structure?
coral + = proton · grey = neutron · purple − = electron
- A. 2,2,9
- B. 13
- C. 2,11
- D. 2,8,3
6
Question 6
Why are noble gases so unreactive?
- A. They are very heavy
- B. Their outer shell is full
- C. They have no electrons
- D. They are liquids
Question 7
How many electrons does an atom of nitrogen (atomic number 7) have in its outer shell?
Answer
8
Question 8
Calcium has atomic number 20. What is its electronic structure?
coral + = proton · grey = neutron · purple − = electron
- A. 2,18
- B. 20
- C. 2,8,8,2
- D. 2,2,16
9
Question 9
Why are noble gases so unreactive?
- A. They are liquids
- B. Their outer shell is full
- C. They have no electrons
- D. They are very heavy
Question 10
How many electrons does an atom of beryllium (atomic number 4) have in its outer shell?
Answer
11
Question 11
Oxygen has atomic number 8. What is its electronic structure?
coral + = proton · grey = neutron · purple − = electron
- A. 8
- B. 2,6
- C. 2,7
- D. 2,2,4
12
Question 12
Who arranged the elements in an early periodic table and left gaps for undiscovered elements?
- A. Isaac Newton
- B. Dmitri Mendeleev
- C. Charles Darwin
- D. Marie Curie
Question 13
How many electrons does an atom of nitrogen (atomic number 7) have in its outer shell?
Answer
14
Question 14
Silicon has atomic number 14. What is its electronic structure?
coral + = proton · grey = neutron · purple − = electron
- A. 2,2,10
- B. 2,8,5
- C. 2,12
- D. 2,8,4
15
Question 15
Why do elements in the same group react in similar ways?
- A. They have the same number of electrons in their outer shell
- B. They were discovered at the same time
- C. They have the same number of neutrons
- D. They have the same mass
Question 16
How many electrons does an atom of silicon (atomic number 14) have in its outer shell?
Answer

Write your answers right on the page. · Free from eurekami.com