Answer:
Elements in same group have same chemical properties due to same number of valence electrons in valence shell.
Explanation:
Chemical properties are those properties which results in transforming the starting material to a entirely new substance with different chemical and physical properties. This transformation takes place after a chemical reaction. Hence, the chemical reactivity of some atoms is greater than the others and vice versa.
In periodic table it is found that the elements in the same group have almost same chemical behaviour. For example, elements of group 8 (or 18) are almost non reactive, while that of group 1 and group 7 are found very reactive and show same chemical behaviour like group 1 elements forms +1 ion while group 7 elements form -1 ions as the group 1 metals have single valence shell electron which upon losing allow the atom to attain stability and the halogen having 7 electrons in valence shell upon accepting one electron allow them to attain a octet of stability respectively.
0 because it’s a transition metal
Answer:
B). Precision.
Explanation:
During the course of measurements, two important factors are been seen to play key part which are accuracy and also precision. Precision here can reflect to the closeness of an answer towards the main value even though accuracy can show that too. Also it can show series of values been reproduced in the measurement flow; though in some cases can be a bit far from the actual value. Also its values are swen to be different because of repeatition and alsio in some cases, observational errors too.
Answer:
Explanation:
Chemical Reactions
1. The rate of a chemical reaction is affected by some factors such as: pressure, temperature, surface area e.t.c
2. Chemical reactions do not involve in changes with regard to the nuclei but in the reorganization of electrons.
3. Isotopes of an element in a chemical reaction behave in a similar manner.
Nuclear Reactions.
1. Nuclear reactions involves a change with respect to the nucleus of an atom, resulting in the production of a different element.
2. The rates of a nuclear reaction are not affected by external factors such as : temperature, pressure, catalyst e. t. c, but are usually spontaneous.
3. Large amount of energy usually accompany nuclear reactions.
