Unit 1  prep 1

Unit 1 prep 1

7th Grade

10 Qs

quiz-placeholder

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Unit 1  prep 1

Unit 1 prep 1

Assessment

Quiz

Science

7th Grade

Hard

Created by

Walaa Reda

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

1)All of the following elements can form positive ions , except.........

a-sodium(11Na)

b-chlorine(17Cl)

c-magnesium(12Mg)

d-aluminium(13Al)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2)The number of energy levels in sodium ion is .......the number of energy levels in its atom.

a-less than

b- more than

c-equal to

d-no correct answer

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3)when an atom is changed into an ion ,the ......is changed.

a-number of protons

b-number of electrons

c-number of neutrons

d-mass number

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4)During the chemical reaction,a magnesium atom(12Mg)loses its outer electrons and changes into ......

a-Mg+

b-Mg -

c-Mg+2

d-Mg -2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5)In trivalent elements ,the outrmost energy level contains....... electrons.

a-(5) or(3)

b-(7) or(1)

c-(6) or (3(

d-(5)or(6)

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

6)The valency of copper in(Cu2O) is ....

a-monovalent

b-divalent

c-trivalent

d-tetravalent

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7)Which of the following is a trivalent atomic number?

a-Hydroxide

b-Sulphate

c-Ammonium

d-Phosphate

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