atomic struc

Question 1

Atoms are made up of _____, _____, and _____.

Answer 1

protons, neutrons, electrons

Question 2

protons and neutrons are found in

Answer 2

nucleus of atom

Question 3

Electrons are located in

Answer 3

orbitals

Question 4

relative mass of a proton

Answer 4

1

Question 5

relative mass of neutron

Answer 5

1

Question 6

Relative mass of an electron

Answer 6

1/1840

Question 7

relative charge of proton

Answer 7

+1

Question 8

relative charge of neutron

Answer 8

0 (neutral)

Question 9

relative charge of electron

Answer 9

-1

Question 10

deflection of proton in electric field

Answer 10

towards neg electrode

Question 11

deflection of neutron in electric field

Answer 11

not deflected

Question 12

deflection of electron in electric field

Answer 12

towards pos electrode

Question 13

angle of deflection formula

Answer 13

charge/mass

Question 14

this is a gd solution

Answer 14

angle of deflection = k(charge/mass), where k is proportionality constant

Question 15

express angle of deflection to ___ dp

Answer 15

1

Question 16

when drawing paths of deflection, deflections only starts from

Answer 16

start of electric field

Question 17

atomic no. is

Answer 17

no. of protons

Question 18

mass no. is

Answer 18

total no. of proton + neutron

Question 19

nucleon no. is

Answer 19

no. of protons and neutrons

Question 20

isotopes are ________ of the ________ _______________ which contain the ___________ number of ____________ but _________ no. of __________

Answer 20

atoms, same element, same, protons, diff, neutrons

Question 21

isotopes of the same element have __________ chemical properties but ______________ physical properties

Answer 21

similar, different

Question 22

isotopes are

Answer 22

atoms of the same element which contain the same no. of protons but diff. no. of neutrons

Question 23

electrons in atom occupy specific region of space arnd nucleus known as an

Answer 23

orbital

Question 24

arrangement of electrons in orbitals is called

Answer 24

electronic structure

Question 25

each principal quantum shell (electronic shell) is assigned a

Answer 25

principal quantum no. n

Question 26

smaller value of n, _________ ___________ the electron bound to nucleus (bc electron________________ to proton)

Answer 26

more strongly, attracted

Question 27

smaller value of n, ________ the energy level of electron

Answer 27

lower

Question 28

eg: principal quantum shell n=1 is _______ __________ attracted to nucleus & has the ________ energy

Answer 28

most strongly, least

Question 29

each principal quantum shell is made up of 1/more subshells, that can be labelled as __,__,___ or ___

Answer 29

s p d f

Question 30

subshell is a ___________________with the _______ energy but _______ orientation in space

Answer 30

grp of orbitals, same, diff

Question 31

subshell s has ___________________

Answer 31

1 orbital (s orbital)

Question 32

subshell p has __________________

Answer 32

3 orbitals (px, py, pz)

Question 33

order of energy levels for subshells is___<____<____<____

Answer 33

s, p, d, f

Question 34

atomic orbitals def: a __________ of ________round the nucleus where there's 95% probability of ______________________

Answer 34

region, space, locating the electron

Question 35

atomic orbitals def:

Answer 35

a region of space round the nucleus where there's 95% probability of locating the electron

Question 36

each orbital can hold max ___ electrons

Answer 36

2

Question 37

s orbitals are ____________ in shape & _______________________

Answer 37

spherical, non-directional

Question 38

size of 1s orbital___ 2s orbital___3s orbital

Answer 38

<, <

Question 39

p orbitals has __ types, have _______________ shape & are ______________

Answer 39

3, dumb-bell, directional

Question 40

size of 2p orbital___3p orbital

Answer 40

<

Question 41

nearer orbital to nucleus, __________ its energy

Answer 41

lower

Question 42

in same principal quantum no., distance of orbital from nucleus is __>___>___, so energy of ___>____>___

Answer 42

d, p, s

Question 43

energy level of 2px___2py___2pz

Answer 43

=

Question 44

in energy level diagram, energy gap between 1s & 2s is __________ than energy gap between 2s & 3s

Answer 44

greater

Question 45

in energy level diagram, energy level of 4s is ________ than 3d orbital when they are empty

Answer 45

lower

Question 46

electronic configuration refers to

Answer 46

arrangement of electrons of its atoms in their shells, subshells & orbitals

Question 47

aufbau principle: electrons occupy _________ energy orbital ________ b4 occupying the ___________ energy orbitals. order of filling in orbitals: _______________________________________________________

Answer 47

lowest, first, higher, 1s 2s 2p 3s 3p 4s 3d 4p

Question 48

Pauli's exclusion principle: each orbital can hold max _____ electrons & the ____ electrons have to be in _____________ spins (https://chemistrytalk.org/pauli-exclusion-principle)

Answer 48

2, 2, opposite

Question 49

Hund's Rule: orbitals must be occupied ____________ b4 ____________ occurs to ensure electrons are as ______ apart as possible to ________________ electronic repulsion

Answer 49

singly, pairing, far, minimise

Question 50

if all rules r followed, resultant arrangement of electrons known as

Answer 50

ground state electronic configuration (lowest energy state)

Question 51

when 1/more electrons absorb energy & r promoted to higher energy level, atom is to be in an

Answer 51

excited state

Question 52

Isoelectronic def: atoms/ions with __________ electronic config.(same no. of electrons)

Answer 52

same

Question 53

Isoelectronic def: _____/______ with _______________________________________

Answer 53

atoms/ions, same electronic configuration

Question 54

Grp: _____________ columns of elements in periodic table

Answer 54

vertical

Question 55

elements in same grp have the ___________ no. of valence electrons--> ________ electronic config.--> _________ chem properties

Answer 55

same, same, similar

Question 56

elements of same grp have _______no. of principal quantum shells

Answer 56

diff

Question 57

period is ________________ rows of elements

Answer 57

horizontal

Question 58

period no.___no. of principal quantum shells

Answer 58

=

Question 59

elements in same period have ________________ of principal quantum shells

Answer 59

same no.

Question 60

elements of same period have _________ no. of valence electrons

Answer 60

diff