What are positive and negative charges ? Which type of charge does electron have ?

A conductor has $14.4 \times {10^{ – 19}}coulombs$ positive charge. The conductor has(Charge on electron $ = 1.6 \times {10^{ – 19}}coulombs$)

Write unit and value of fundamental electric charge.

Five balls numbered $1$ to $5$ are suspended using separate threads. Pairs $(1, 2)$, $(2, 4)$ and $(4, 1)$ show electrostatic attraction, while pair $(2, 3)$ and $(4, 5)$ show repulsion. Therefore ball $1$ must be

From what the name electricity is coined ? Explain its meaning.