Which type of radioactive emission has a positive charge and weak penetrating power?

(1) alpha particle (3) gamma ray

(2) beta particle (4) neutron

Calculate the number of atoms in a 3.52*10^3 g sample of lithium

Given: CaC2 + N2 → CaCN2 + C In this chemical reaction, how many grams of N2 must be consumed to produce 265 grams of CaCN2? Express your answer to three significant figures. The reaction requires how many grams of N2?

How are the elements in the periodic table arranged from left to right and top to bottom based on what value?

One gallon of water has a mass of 3.78kg. Water is 11.2% hydrogen by mass. Calculate the mass of hydrogen contained in this gallon of water

When does a star reach equilibrium?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen

What was the result of the atomic theory?

Explain mitosis and meiosis in your own words.

What device changes mechanical energy into electrical energy? Question 4 options: transformer generator copper wire light switch

Reaction rates are affected by how often the particles collide true false