A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it?

Is a persons DNA likely to be more similar to the DNA of his biological parents or to the DNA of one of his first cousins

Which illustration represent the substance at a higher temperature? Explain.

Which is a reasonable and healthy substitute for using drugs alcohol or tobacco

A top-fuel dragster starts from rest and has a constant acceleration of 42.0 m/s2. What are (a) the final velocity of the dragster at the end of 1.8 s, (b) the final velocity of the dragster at the end of of twice this time, or 3.

What are anticlines and synclines? A. They are types of folds created by compressional stresses B. They are folds in rock that are created by tension stresses C. They are types of faults created by tension stresses D.

How can you tell one element from another?

Which of the following is not an accurate statement about the attitude of teenagers when driving

the circumference of Earth's orbit is 938 million kilometres how fast does earth travel in km/h in one year

A material is said to be ductile if it

A professional soccer player succeeds in scoring a goal on 84% of his penalty kicks. assume that the success of each kick is independent.