What is the most basic building block of matter?

the electron

the proton

the quark

the atom

2nd question:

Which part of an atom has a negative charge?

neutron

nucleus

proton

electron

Which item would react most rapidly if touched by a match? a log sawdust small twigs tree branches

What pressure will be needed to lwave the vloume of 77.4L ay helium at 98. OK pa to a vloume of 60.0L

Why Na + ion are smaller than Na atom?

What happens when a solid becomes a liquid? A) it changes shape and volume B) it changes volume but not shape C) neither volume nor shape changes D) it changes shape but not volume

What percentage of water on earth is fresh water

Arrange the following aqueous solutions, all at 25 ∘C, in order of decreasing acidity. Rank from most acidic to most basic. To rank items as equivalent, overlap them.

What is the pH of a 9.50*10-2 M ammonia solution?

Find the final equilibrium temperature when a 10.0 g of milk at 10.0c is added to 1.60 x 10^2 g of coffee with a temperature of 90.0 c

A glass with clear bubbly liquid is on the counter. You're not sure if it's Sprite or water someone has dissolved antacid in it. How could you tell without tasting or smelling the liquid? Explain thoroughly.

Write the following numbers in standard notation, maintaining the same number of significant figures. 6.104 x10^2 9.5 x 10^-3 Move the decimal by a certain number of spaces, according to the exponent of 10