Select the correct answer.

Which particles make up the nucleus of an atom?

A.

protons and electrons

B.

neutrons and electrons

C.

protons only

D.

protons and neutrons

E.

neutrons only

which term correctly describes all of the following materials (salt water, vinegar, bronze, air, beach sand

What effect does a decrease in temperature have on the overall rate of a chemical reaction? A decrease in temperature decreases. The reaction rate will.

Which cell part contains direction for cell growth and reprodution?

A certain element forms an ion with 54 electrons and a charge of + 2. identify the element.

What acid and what base would you choose to prepare the salt potassium perchlorate (kclo4) ?

Describe 2 theories for yawning

When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. the reason for this is?

Where does transcription happen? why is it only in this location?

True or false during decomposition nitrogen gas is changed into nitrogen compounds

Which of the following is a suggested practice to invite families to participate in decision-making and goal-setting for their child? A. Advocacy events B. Take-home backpacks C. Family/teacher conference D. Weekly newsletters