An atom consists of three types of particles: proton. electron, and neutron. each atom of an element has the same number of which type of particle

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

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million