How many neutrons does element X have if it's atomic number is 33 and it's mass number is 93?

A systematic error in data is called

Jannah is looking for an internship that will advance and support her love of astronomy. She is 17 years old, has a 4.

The puzzle box is traditionally associated with the work of

How long does it take for a particle to move with initial velocity 80km/hr to 100km/hr in 100m

The upward force on an object falling through the air is?

During a medical condition screening lung capacity testing is a standard procedure. True of false

Which of the following is a unit of energy found in food? a). vitamin b) calorie c) nutrient d) water

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

Which of the following surfaces reflects the most light A yellow cloth B. tree trunk C aluminum foil D. Concrete sidewalk

Which part of an atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom? A. nucleus B. electron C. proton D. electron cloud