I need a a picture or the question
After 100years, sample is 250g
After 200 years, sample is 125g
After 300years, sample is 62.5 g
Answer:
elecreonegativity is the attraction of a bonded atom for the pair of electrons in a covalent bond. this can occur if:
- the nuclear charges are different
- the atoms are different sizes
- the shared pair of electrons are closer to one nucleus than the other
Answer:
False
Explanation:
The given statement is false.
Mendeleev devised periodic table by arranging elements in increasing order of their atomic masses.
According Mendeleev, physical and chemical properties of the elements are function of their atomic masses.
Henry Moseley arranged elements in increasing order of atomic number. Periodic table based on increasing order of atomic number is called modern periodic table.
