Atomic Structure

Question 1

what are isotopes?

Answer 1

atoms of the same element that have the same number of protons but different number of neutrons

Question 2

properties of isotopes?

Answer 2

• similar chemical properties (same proton number)
• different physical properties (different neutron numbers)

Question 3

what is the order of the quantum mechanical atom?

Answer 3

1. principal quantum shells
2. subshells
3. orbitals
4. electrons

Question 4

what are atomic orbitals?

Answer 4

a region of space around the nucleus where there is a 95% probability of locating an electron

Question 5

properties of s orbitals?

Answer 5

• spherical
• non directional

Question 6

properties of p orbitals?

Answer 6

• dumbbell shaped
• directional

Question 7

properties of the 1s orbital/1n principal quantum shell?

Answer 7

• lowest energy level
• electrons are most strongly bound to the nucleus

Question 8

definition of electronic configuration?

Answer 8

arrangement of electrons in its shells, subshells and orbitals in an atom

Question 9

definition of isoelectronic?

Answer 9

atoms and ions with the same electronic configuration

Question 10

in terms of electronic configuration, elements of the same groups share the same..?

Answer 10

• number of valence electrons
• valence electronic configuration
• similar chemical properties

Question 11

in terms of electronic configuration, elements of the same periods share the same..?

Answer 11

number of principal quantum shells