Which statement about groups in the Periodic Table is correct? A)
All groups contain both metals and nonmetals
B)
Atoms of elements in the same group have the same total number of
electrons
C)
In Group I, reactivity decreases with increasing atomic number
D)
In group VII, the melting point of the elements increases with atomic
number

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward