NaBr + CaF2 → NaF + CaBr2 What coefficients are needed to balance the chemical equation? A) 1,1,1,1 B) 1,2,1,2 C) 1,2,2,1 D) 2,1,2,1

The organelle that creates proteins is what? A-mRNA B-the Ribsome C-tRNA D-the nucleus

Which if the following is true about scientific theory? a. A theory is a proposed explanation for a hypothesis b. A theory can be formed after a single experiment c. A theory can be changed to explain new observations or experimental results d.

Where are elements with similar chemical properties found on the periodic table?

While forming a hypothesis, a scientist has to look into a problem creatively partially hypothetically theoretically

Which phrase can accurately be placed in the middle, within both circles? a) has a ph of 7 b) dissolves metals eliminate c) ionizes in water d) turns red litmus paper blue?

Anatom that has lewer neutrons than protons and more electrons than protons is

Which can have either a positive charge or a negative charge when they are released during radioactive decay? A. alpha particles B. beta particles C. positrons D. photons

Which ionic compound is water soluble? A. cuS B. NH4NO3 C. SrSO4 D. ZnF

What is part of an experiment that is not being tested and is used for comparison

Is hydrogen sulfide a heterogeneous mixture solution compound or element?