SC1 - ATOMIC STRUCTURE + THE PERIODIC TABLE

Question 1

proton location

Answer 1

nucleus

Question 2

neutron location

Answer 2

nucleus

Question 3

electron location

Answer 3

shells that orbit the nucleus

Question 4

proton mass

Answer 4

1

Question 5

neutron mass

Answer 5

1

Question 6

electron mass

Answer 6

almost 0

Question 7

proton charge

Answer 7

+1

Question 8

neutron charge

Answer 8

0

Question 9

electron charge

Answer 9

-1

Question 10

mass number

Answer 10

mass of an atom; number of protons + number of neutrons

Question 11

atomic number / proton number

Answer 11

number of protons in an atom (equal to number of electrons in a NEUTRAL atom)
* if the proton number changes, the element changes.

Question 12

isotope definition

Answer 12

the same element that has a different number of neutrons -> different mass

Question 13

relative atomic mass calculation taking into account isotopes

Answer 13

(mass1 x frequency (%)) + (mass2 x frequency (%))
/100

Question 14

Mendeleev’s periodic table (features)

Answer 14

• arranged in order of increasing mass
• left gaps in his periodic table for elements that has not been discovered and correctly predicted the properties of these elements

Question 15

the modern periodic table (features)

Answer 15

• columns (I) of elements are called groups
• groups of elements have similar properties
• rows (—) of elements are called periods

Question 16

shells are filled with the inside ([highest/lowest] energy) first

Answer 16

lowest

Question 17

the first 3 electron shells can fit _, _, _ electrons

Answer 17

2, 8, 8

Question 18

elements in the same group have…

Answer 18

• the same same number of electrons in the outer shell
• similar chemical properties

Question 19

elements in the same period have…

Answer 19

• the same number of shells
• an extra electron is added to the same shell as you move along