Question

plz help...............................................................its urgent

Answer 1

1A) a answer is 1
b) answer is fluorine
c) answer is covalent
d) low melting and boiling point
e) be an electrolyte

B. a) the rate to which a element ionised is ionised potential.
b) a substance whose ph value is below 7 is an acid it when dissolve in water give H± ion.
c) the bond form by sharing of electron is called covalent bond.
d) the radio of atom of particular elemiis called atomic radio.
e,) certain water soluble substance when exposed to atmosphere at ordinary temperature, absorb moisture from atmosphere, become moist and ultimately lose there crystalline form such substance are called deliquescent substance..
Q. 2.A
a) because it has no free electron in it.
b) because it need three electron to become stable.
c) because they have weak bond in between them
d) because no. of nuclear charge decide the caps city of atom
e) because there outermost shell are already stable.
B)
a) sulphuric acid
b) covalent bond
c) beryllium
d) chlorine
e) three

Answer 2

Q1...
A)
1. Group 1
2. fluorine
3. covalent
4. low melting and low boiling points
B)
1. the energy needed to remove an electron from an atom or molecule from its outermost shell
2. compounds which react with bases to give salt and water
3. coordinate covalent bond is when two atoms have a covalent bond where the two electrons that are shared by the atoms in the bond come from only one of the atoms.
4. the distance between the nucleus of an atom to the electron in the outermost shell
5. the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution

Q2.....
A)
1.solids do not have mobile or free ions to conduct electricity, strongly held bonds between solids can't conduct electricity
2. nitrogen has valency of 3, thus when two nitrogen atoms combine they form triple bond sharing electrons
3. The intermolecular forces are less powerful than the ionic bonds holding an ionic lattice together, thus covalent compounds are more volatile
4. more nuclear charge...more is the attraction thus atomic radii depends on nuclear charge
5. noble gases have their valency as zero and have completed their duplet or octate
B)
1. strong acids
2. covalent bond
3. Be
4. Cl