A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

EasyMedium
12345678910111213141516171819202122232425262728293031323334353637383940414243444546
Question 21
Medium

Figure 1 shows two early models of the atom.

Figure 1 showing two models of the atom. Model A has a tiny central nucleus marked with a plus sign (+) representing positive charge. Electrons, represented by circled minus signs (-), are scattered randomly in the empty space surrounding this positive nucleus. Model B shows a tiny central nucleus with a plus sign (+), surrounded by three concentric circular paths representing orbits (shells). Electrons, represented by circled minus signs (-), are arranged on these concentric circular paths.

a.

Name the models of the atom shown in Figure 1.

  • Model A
  • Model B
[2]
b.

Compare the plum pudding model of the atom with Rutherford's nuclear model (Model A). Describe the similarities and differences.

[4]
c.

Carbon has two isotopes: carbon-12 (12C^{12}\text{C}12C) and carbon-14 (14C^{14}\text{C}14C). Both isotopes have the atomic number 6. Explain why these two atoms are classified as isotopes of carbon. Refer to subatomic particles in your answer.

[3]

A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes Questions

  1. GCSE
  2. /Chemistry
  3. /A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes