اختبار ساينس Science - اولى اعدادي -مقرر اكتوبر -نموذج 2 - بدء الاختبار

A neutral atoms has 85 protons and 125 neutrons What is its mass number

210

125

سؤال 1

الدرجة 1.00

In NPK fertilizer. The element needed to developing strong roots is Nitrogen

True

False

سؤال 2

الدرجة 1.00

The nucleus is the smallest part of the atom and takes up the least space

True

False

سؤال 3

الدرجة 1.00

The fertilizer NPK composed of three compound containing the elements

phosphorus , Nitrogen, calcium

Nitrogen, potassium ,calcium

phosphorus , Nitrogen, carbon

phosphorus , Nitrogen, potassium

سؤال 4

الدرجة 1.00

Isotopes are the atoms of an element with different numbers of protons but the same number of neutrons

False

True

سؤال 5

الدرجة 1.00

Where is most of the mass of an atom located?

electron

Nucleus

neutron

proton

سؤال 6

الدرجة 1.00

The subatomic particle with a negative charge is the

electron

proton

neutron

b+c

سؤال 7

الدرجة 1.00

What does the atomic mass represent?

PROTONS + NEUTRONS

NEUTRONS

PROTONS

PROTONS - NEUTRONS

سؤال 8

الدرجة 1.00

There are …….. main energy levels

سؤال 9

الدرجة 1.00

In NPK fertilizer. The element necessary for healthy growth of the plant is phosphorus

True

False

سؤال 10

الدرجة 1.00

The subatomic particle with a positive charge is the …………

proton

neutron

electron

b+c

سؤال 11

الدرجة 1.00

The mass number is represented by the symbol A and is written at the ……….side of the element symbol

upper right

lower left

lower right

upper left

سؤال 12

الدرجة 1.00

Dalton formulated the first scientific theory about the atom, showing that the atoms are divisible

False

True

سؤال 13

الدرجة 1.00

The subatomic particle with no electrical charge is the ........

neutron

electron

proton

A+c

سؤال 14

الدرجة 1.00

How do you find the number of neutrons in an atom ?

atomic number- mass number

mass number- atomic number

atomic number X mass number

mass number+ atomic number

سؤال 15

الدرجة 1.00

fertilizer are chemical compounds used to improve the agricultural crops

True

False

سؤال 16

الدرجة 1.00

…….. formulated the first scientific theory about the atom its

Newton

Dalton

Rutherford

Bohr

سؤال 17

الدرجة 1.00

The outmost energy level of any atom does not contain more than

8 neutrons

6 electrons

4 electrons

8 electrons

سؤال 18

الدرجة 1.00

Ancient Greek philosophers believed that matter was made up of small, indivisible parts called Atoms

Particles

Atoms

Atomic particles

Molecules

سؤال 19

الدرجة 1.00

The atomic number is the number of protons an atom contains

True

False

سؤال 20

الدرجة 1.00

The masses of subatomic components in the atomic mass units are measured in atomic mass units ( u)

False

True

سؤال 21

الدرجة 1.00

The electrons are the lightest in weight of the three subatomic particles

True

False

سؤال 22

الدرجة 1.00

The atomic number is represented by the symbol Z and is written at the ….side of the element symbol

lower right

upper right

lower left

upper left

سؤال 23

الدرجة 1.00

A neutral atoms has 85 protons and 125 neutrons How many electrons does atoms has?

125

210

سؤال 24

الدرجة 1.00

Electrons are present in the nucleus

False

True

سؤال 25

الدرجة 1.00

The number of negative electrons in the atom in its normal state equals

half the number of neutrons

number of protons

twice the number of protons

number of neutrons

سؤال 26

الدرجة 1.00

The number of electrons required to saturate the first four levels of energy can be determined by the mathematical relationship

(2n² )

(3n² )

(2n³ )

( n² )

سؤال 27

الدرجة 1.00

……..revolve around the nucleus at different energy level according to their energy

electrons

protons

neutrons

A + C

سؤال 28

الدرجة 1.00

In NPK fertilizer. The element needed for the greening of plant leaves is:

Nitrogen

Phosphorus

Calcium

Potassium

سؤال 29

الدرجة 1.00

The atomic number is the same as the number of

proton

neutron

electron

b+c

سؤال 30

الدرجة 1.00

There are the same number of these two particles in an atom

proton

neutron

electron

A + C

سؤال 31

الدرجة 1.00

When the elements differ between English and Latin name its symbol is taken from its

capital English

Latin name & English

English name

Latin name

سؤال 32

الدرجة 1.00

A neutral atoms has 85 protons and 125 neutrons What is its atomic number.........

210

125

سؤال 33

الدرجة 1.00

How many electrons can each level hold?

1st = 2 2nd = 8 3rd = 8

1st = 2 2nd = 8 3rd = 18

1st = 2 2nd = 4 3rd = 18

1st = 4 2nd = 8 3rd = 18

سؤال 34

الدرجة 1.00

The mass of the electrons is neglected in calculation of the atomic mass

False

True

سؤال 35

الدرجة 1.00

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