Cobalt, rhodium and iridium are metals in the same group of the Periodic Table. Table 1.1 gives some details of the stable naturally occurring isotopes of rhodium and iridium. Table 1.1 Complete Table 1.1.

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_w24_qp_21 Year：2024 Question No：1(b)

Answer:

Knowledge points:

1.1.1 understand that atoms are mostly empty space surrounding a very small, dense nucleus that contains protons and neutrons; electrons are found in shells in the empty space around the nucleus

1.1.2 identify and describe protons, neutrons and electrons in terms of their relative charges and relative masses

1.1.3 understand the terms atomic and proton number; mass and nucleon number

1.1.4 describe the distribution of mass and charge within an atom

1.1.5 describe the behaviour of beams of protons, neutrons and electrons moving at the same velocity in an electric field

1.1.6 determine the numbers of protons, neutrons and electrons present in both atoms and ions given atomic or proton number, mass or nucleon number and charge

1.1.7 state and explain qualitatively the variations in atomic radius and ionic radius across a period and down a group

2.1.1 define the unified atomic mass unit as one twelfth of the mass of a carbon-12 atom

2.1.2 define relative atomic mass, Ar, relative isotopic mass, relative molecular mass, Mr, and relative formula mass in terms of the unified atomic mass unit

Cobalt, rhodium and iridium are metals in the same group of the Periodic Table. Table 1.1 gives some details of the stable naturally occurring isotopes of rhodium and iridium. Table 1.1 Complete Table 1.1.

Answer:

Knowledge points:

Solution:

Related Question