The elements of a group have the same number ofin their outer shell, called valence electrons ​

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Which metal exist in liquid state and can be cut with knife ?