As one goes from left to right in a period, which of the following is true?

A. The number of protons decreases.

B. The number of valence electrons increases.

C. both A and B

D. none of the above

When you break a magnet in half, how many poles does each piece have? Explain.

Fresh milk has several parts that a farmer can seperate and sell a farmer removes the top layer of fat from fresh milk why is the layer of fat on the top

What is menat by the age of the universe? how old is the universe?

An 8 Ω resistor is connected to a 6 V battery and another resistor in series. If the current in the circuit is 0.5 A, what is the resistance of the other resistor?

Problem 7: In a mass spectrometer, a specific velocity can be selected from a distribution by injecting charged particles between a set of plates with a constant electric field between them and a magnetic field across them (perpendicular to the

Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder.

A rock is thrown from a cliff and hits the ground five seconds later at a distance of 50 m from the cliff how high was a cliff

A 15.0 m long plane is inclined at 30.0 degrees. If the coefficient of friction is 0.426, what force is required to move a 40.0 kg mass from rest at the bottom on the plane to the top of the plane with a final velocity of 8.00 m/s?

In a pig-calling contest, a caller produces a sound with an intensity level of 60 db. how many such callers would be required to reach the pain level of 120 db? 2 incorrect: your answer is incorrect.

Why is the use of scientific names important in biology?