![GEMS MODERN ACADEMY
TERM 1
REVISION
TIME : 45 min
Q1
1. State two differences between elements and compounds. [2]
2. Give the Latin names for Tin and Copper. [2]
3. State the electronic configuration of :- H,Ne,Ca. [3]
4. Define the term isotopes.Whydo they differ from the physical properties?
[3]
Q2
Mg + O MgO
1. Correct the equation.Identify the reactants and products. [2]
2. What do the following mean in a reaction [2]
a. ∆
b. (aq.)
3. An element ‘X’ has 2 electrons in it’s valence,it is non reactive. [3]
a. Write it’s symbol
b. Write the element.
c. Name a another element which is non reactive
4. An element ‘A’ has 4 electrons.It has a mass number of 9 .Find : -
a. Atomic number
b. Mass no.
c. State it’s electronic configuration [3]
Q3
1. State the use of the test tube and conical flask? [2]
2. Why is there a need for the Wire gauze ? [2]
3. Which instrument is used to handle tiny objects?Name any two other lab
apparatus. [3]](https://image.slidesharecdn.com/gemsmodernacademychemgrade7revisionfirstterm-140703093433-phpapp02/85/balancing-equations-and-types-of-reactions-GREAT-FOR-STUDENTS-OF-6-7-8-9-AND-10TH-GRADE-1-320.jpg)
![4. If you would like to burn a magnesium ribbon,what apparatus would you
need.Justify your statement.Write a balanced equation for the same.[3]
Q4
Na + Cl2 NaCl
1. State the law of conservation of mass/matter [2]
2. Is the above correctaccording to this law?Why/Why not? [2]
3. Correct the above equation.Identify the reactants and products.[3]
4. Balanced equations
a. Why?
b. How?
c. Example? [3]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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balancing equations and types of reactions GREAT FOR STUDENTS OF 6,7,8,9 AND 10TH GRADE
- 1. GEMS MODERN ACADEMY TERM 1 REVISION TIME : 45 min Q1 1. State two differences between elements and compounds. [2] 2. Give the Latin names for Tin and Copper. [2] 3. State the electronic configuration of :- H,Ne,Ca. [3] 4. Define the term isotopes.Whydo they differ from the physical properties? [3] Q2 Mg + O MgO 1. Correct the equation.Identify the reactants and products. [2] 2. What do the following mean in a reaction [2] a. ∆ b. (aq.) 3. An element ‘X’ has 2 electrons in it’s valence,it is non reactive. [3] a. Write it’s symbol b. Write the element. c. Name a another element which is non reactive 4. An element ‘A’ has 4 electrons.It has a mass number of 9 .Find : - a. Atomic number b. Mass no. c. State it’s electronic configuration [3] Q3 1. State the use of the test tube and conical flask? [2] 2. Why is there a need for the Wire gauze ? [2] 3. Which instrument is used to handle tiny objects?Name any two other lab apparatus. [3]
- 2. 4. If you would like to burn a magnesium ribbon,what apparatus would you need.Justify your statement.Write a balanced equation for the same.[3] Q4 Na + Cl2 NaCl 1. State the law of conservation of mass/matter [2] 2. Is the above correctaccording to this law?Why/Why not? [2] 3. Correct the above equation.Identify the reactants and products.[3] 4. Balanced equations a. Why? b. How? c. Example? [3]