امتحان

Nonmetals react with oxygen fo r ming metal oxides

1

False

2

True

تصحيح

Moseley’s periodic table are arranged ascendingly acco r ding to their …………

1

atomic weights

2

Atomic size

3

atomic numbers

تصحيح

Elements are divided into ……….. main kinds .

1

5

2

6

3

8

4

تصحيح

Electronegativity It's ability of atom in covalent molecule to attract electrons of the bond towards

1

False

2

True

تصحيح

The group number = no. of electrons in outer level

1

True

2

False

تصحيح

………..is strongest metal in 1A

1

Zn Zinc

2

Na Sodium

3

Cesium Cs

4

K Potassium

تصحيح

Zn Zinc a nd Fe Iron React in low temperature with only cold water

1

True

2

False

تصحيح

The period starts with...........

1

semimetals

2

nonmetal

3

strong metal

تصحيح

Mendeleev’s periodic table is first table to classify elements

1

True

2

False

تصحيح

The electro negativity of …………. is the highest value

1

Zinc

2

Magnesium

3

Fluo r ine

تصحيح

العلوم الصف الثانى الاعدادى الترم الاول