Answer:
Measuring a pencil in meters would be very difficult, as a single meter is much longer than one pencil. Also, measuring a hallway in millimeters would be very difficult considering how small millimeters are in comparison to a hallway. However, if you switch these two then they would work very well.
In my opinion, the correct answer among the choices above is option B. AN atom having four electrons in its valence shell is capable of single, double, or triple covalent bonds. This is because 4 electrons of the atom can be shared with other atoms.
Answer:
they must have same atomic number and different atomic mass
This is a compound, i remember it because it looks like 3 balls being pushed together.
Answer:
A... According to the periodic table, elements with one electron at the outermost shell or orbital are classified as alkali METALS