A positive sodium ion differs from a sodium atom in that the

A positive sodium ion differs from a sodium atom in that the sodium ion (a) is an isotope of sodium (b) has a negative charge on its nucleus (c) has more protons (d) has fewer electrons Both matter and radiation have properties of waves and properties of particles (a) True (b) False. Matter has particle-like properties and radiation has wave - like properties (c) False. Only matter has both particle-like and wave-like properties (d) False, Only radiation has both particle-like and wave-like properties The lines of different wavelength produced in the emission spectra of an element are unique for each element and can be used to identify it. (a) False, Any element can produce emission spectroscopic lines of any wavelength (b) False, Spectroscopic lines are produced only by elements with just one proton (c) False. All the lines of a given element have the same wavelenth (d) True We know there is Hydrogen in the sun because (a) We took a sample and analyzed it in the laboratory (c) It is too hot for anything else to be there (c) The emission lines of Hydrogen were found in the spectra of the sunlight. (d) It is just a hypothesis without experimental evidence to support it^12_6 C and^14_6 C are two isotopes of Carbon. What is the difference between them? (a) Two electrons (b) Two protons (c) Two neutrons (d) One proton and one neutron

Solution

11)A positive sodium ion differs from sodium atom in that the sodium ion

Answer-c)Has more protones

Explaination-Sodium atom has a neutral charge while a sodium atom has a posite charge.Sodium atom has atomic number 11(11 protons and 11 electrons). It has one electon in it\'s outermost orbit .It gives up the electron and becomes positively charged.

2)Both matter and radiation have properties of wave and properties of particle-

Answer-a)True

13)The line of different wavelenght produced in the emmission spectra of an element are unique for each element and can be used to identify it-

Answer-D)True

Explaination- When an atom absorbs energy, its electrons jump to higher energy levels this corresponds to a particular wavelength of light.

There are many possible electron transitions for each atom. Each transition has a specific energy difference. This collection of transitions makes up an emission spectrum. These emission spectra are as distinctive to each element as fingerprints are to people.

14)We know there is hydrogen in sun because-

Answer-C)The emission lines of Hydrogen were found in the spectra of the sunlight.

Explanation-Each element generates its own unique set of wavelenghts of emission or absorption.

15)¹²C₆ and ¹⁴C₆ isotopes of carbon .What is the difference between them?

Answer-C)Two neutrons

Explaination^-2C_{6 -}Neutrons6 ,Protons-6

¹⁴C₆ -Neutrons-8, Protons-6