Answer:Statement 1 and 3 are true
Explanation:
Ca+(g) + e- ➡Ca(g)
Electron affinity of an atom or molecule is defined as the change in energy (in kJ/mole) of a neutral molecule(in gaseous state)when an electron is added to an atom to form a negative ion.Energy is released in the process thus the first electron affinities are negative.
On the other hand ionisation energy is the quantity of an energy a gaseous atom in its ground must absorb to discharge an electron.
H(g)➡H+(g) + e-
Considering both these definitions,statement 1 and 3 both falls true.
Answer:
a) Neutralisation
b) Combustion
c) Synthesis
d) Decomposition
e) Neutralisation
f) Double Displacement Reaction
h) Single Displacement Reaction
i) Double Displacement Reaction
j) Combustion
Explanation:
Synthesis is a reaction where various compounds/ elements react to form a totally new compound.
Decomposition is a reaction where a single compound breaks down into several components due to excessive heating or energy applied.
Single Displacement Reaction is a type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound.
Double Displacement Reaction is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.
Combustion is a reaction where a compound/ element oxidises in the presence of Oxygen.
Neutralisation reaction is a reaction where an acid reacts with a base to form a salt.
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2anorexia brittle hair
3bulimia torn esophagus
4cirrhois
<span>The representative particle for silicon is atom of silicon.
</span>Representative particles can be atoms, molecules, formula units or ions. Representative particles depend on the nature of the substance. Silicon is chemical element made of atoms.
For sodium chloride (NaCl) for example, representative particles are ions.
Answer:
When the speed of an object remains the same for a certain distance of time
Explanation: