All the actinoids, atomic number 89 through 103 have seven electron orbits.

1. true
2. false

True

Explanation:

We are given that all actinoids

General configuration of actinoids series

Actinoids element are

Ac=89=

Th=

We can see that period of actinoid series =7

Electron orbit=period=7

Hence,the statement is true.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.