What's the difference between groups and periods in a periodic table?

If the sun died would it create a black hole?

Calculate the force of gravity on a 5 kg mass at Earth's surface. The mass of the Earth is 6 x 1024 kg and its radius is 6.4 x 106 m. Do not use scientific notation. Round to a whole number (no decimal).

A car acclerates forward at 3.5m/s2. if the car has a mass of 873 kg, whats the force applied to the car

An electric motor uses

Why do we have seasons on Earth

What does Kepler's second law state? A. Planets travel in ellipses. B. Planets sweep equal areas in equal times. C. A planet's apparent backward movement is termed retrograde motion. D.

Why do charges build up in a cloud

How does the wave model of electrons orbiting the nucleus account for discrete energy values?

An ecosystem is all the populations of organisms that live together and A. the microorganisms that depend on them. B. the organisms that generate energy from sunlight. C. the physical factors with which they interact. D.

Which statement about magnetic poles is accurate? A) Same magnetic poles attract, while different magnetic poles repel. B) Same magnetic poles attract, while different magnetic poles attract.