How many electrons does barium have to give up when forming an ion

Describe how alleles and genes are related

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2