Explanation:
1) from the periodic table for example if u looking for K it is from the group 1A so the valancey = +1 that is mean it loses one electron to reach a stable state. and this applied for the 1A , 2A, 3A groups.
if u looking for N it is from group 5A so its valency is -3
so it gain 3 electrons to reach a stable state to complete its orbital to 8 electrons. this applied to 5A, 6A,7A
for the transition metals and simimetals other rules.
2) neutral if the element does not hold any charge like
H2, O2, N2, Fe, Au, Cu ...
isotope : if the 2 elements have same symbol and atomic number but they differ in the mass number because the have different numbers of neutrons.
if the element is charged then it is considered as an ion ex: Fe2+ then it is iron cation ( +ion)
F- then it is fluoride anion (-ion)
if u have any doubt just writ a comment ( ;
Simple machines help reduce the amount of work being done, as they help by using a simple function. One disadvantage is that they do not help completely.
Answer:
commensalism
(hope i spelled that right)
Explanation:
if the bird only nest in it and
the tree isn't really bothered or affected by the bird.
Here's the Answer !
Atomic number = no. of electrons = no. of protons, therefore :
and mass number = no. of protons + no. of neutrons
so,
Answer:
The negatively charged rod will force a stream of water away from the rod because of the "attractive force. "
Explanation:
As we know that water molecules have been randomly arranged. So when a negatively charged rod is put near the stream of water, the molecules present in the water start rotating, unless the positive side will be close to the negative side of the rod. Which results in the generation of the attraction force. Hence, the stream of the water forces away the negatively charged rod. When the water molecules have polarized molecules in it the effect will be stronger than the dust.
