The number of protons and electrons of an atom is equal
and the amount can be obtained by looking at the atomic number of that atom or
element.
The atomic numbers are:
Gold = 79
Thallium = 81
So we are looking for the element with an atomic number of
80, that is:
Mercury
Answer:
<span>Mercury (Hg)</span>
Mass<span> is the amount of matter in an object and </span>weight<span> is the measurement of the gravitational pull on an object. The </span>mass <span>of an object is the same no matter where it is, but the </span>weight <span>of an object changes with the location of that object.</span>
Answer:
Polling is a method used for the purification of copper or tin which contains oxide impurities
Answer:
On heating sodium hydrogen carbonate (NaHCO3). It decomposes to form sodium carbonate (Na2CO3), water (H2O) and carbon dioxide (CO2)
(ii) 2NaHCO3(s)Heatsodiumcarbonate(sodaash)Na2CO3(s)+CO2(g)+H2O(l)
