(g.r) A bond can form between two chlorine atoms, but a bond cannot form between two sodium atoms
because both of them is nonmetals and can share electrons to form covalent bond
The molecular formula of a compound resulting from the combination of an element (X) from alkali metals with an element from halogens (Y)
XY
The bond formed between alkali element and halogen element is………………
ionic bond
Bonding of a carbon atom to four hydrogen atoms what would happen
a covalent will be formed forming methane
The outermost level in the nitrogen ion (N7) contains ....... electrons.
The bond that forms between two atoms of halogens element is ……………… covalent bond
single
A non-metallic atom has gained one electron or more (s.t)
negative ion |(anion)
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Ionic bond occurs between .......... and............ while The covalent bond occurs between two............
A bond that results from sharing each atom with three electrons.
triple covalent bond
A bond that results from electrical attraction between a positive ion and a negative ion.
ionic bond
The number of energy levels in the sulphur ion (S16) is ………………… than energy levels in its atom (
equal
When an atom turns into positive ion, the number of energy levels……………… (Decreases – Increases – Remains the same – Double)
decrease
The ion whose nucleus contains 27 nucleons, including 14 neutrons, has the symbol (SI+4 - Al+3 - Mg+2 - Na+1 )
Al
The element whose atomic number is (17) forms a covalent bond with the element whose atomic number is………………… ( 1 – 11 – 12 – 13)
1
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When a metal loses an electron, it turns into a positive ion. (G.R)
because number of protons more than electrons
An atom of element (X) is binds to two hydrogen atoms as shown in the opposite figure What is the type of bonding in this molecule? And what is the group number of element (X) in the periodic table? a) Ionic / Group 6A b) Ionic / Group
The number of electrons in outermost energy level of the oxygen ion (O8) is …………… electron
10
An atom of element (A) from the fifth group is linked to three hydrogen atoms to form a compound with the formula…………… (AH – HA- HA3 – AH3) And the bond in the molecules is……………… (Single covalent – Double covalent – Triple covalent - Ionic)
AH3 - single covalent
Give one example of each Molecule containing a double covalent bond and ionic bond
oxygen, sodium chloride
The bond in the oxygen molecule is double covalent (g.r)
because formed from sharing 2 pair of electron between oxygen atoms
The bond between the elements of the sixth group and the elements of the seventh group is
covalent
- Bonding of two oxygen atoms what would happen
The closest inert gas to the element (Ca20)……………… ( Helium – Neon – Argon – Krypton)
argon
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