Chemistry, 14.04.2020 08:14, punkinrichard1oxon2i

5
The number of known elements changed very rapidly over a
150-year period. There were 62 known elements in the mid-1800s.
How many know elements (total) are there today?

Answers: 2

Show answers

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 20:30, mimithurmond03

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

Answers: 2

continue

Chemistry, 22.06.2019 06:00, joelpimentel

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

Answers: 2

continue

Chemistry, 22.06.2019 10:30, kylemartinez13

Which characteristics can be used to differentiate star systems? check all that apply.

Answers: 2

continue

Chemistry, 22.06.2019 14:20, greenbyron88

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull

Answers: 1

continue

Do you know the correct answer?

5
The number of known elements changed very rapidly over a
150-year period. There were 6...