Help in timed
Scientists improved Mendeleev’s early periodic table by .
using numbers o...
![subject](/tpl/images/cats/himiya.png)
Chemistry, 25.01.2021 23:00 Theresab2021
Help in timed
Scientists improved Mendeleev’s early periodic table by .
using numbers of neutrons and protons to organize the elements by their properties
using atomic number instead of atomic mass to organize the elements
including physical properties of elements such as melting point and density
including chemical properties of elements such as the ability to burn or to tarnish
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 09:30
One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 12:00
A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 12:10
If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?
Answers: 3
You know the right answer?
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
Health, 09.07.2019 00:30
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30
![question](/tpl/images/cats/mat.png)
Mathematics, 09.07.2019 00:30