1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ra1l [238]
3 years ago
6

Similarity between modern and mendeleev periodic table.

Chemistry
1 answer:
creativ13 [48]3 years ago
6 0

Similarities between Mendeleev's periodic and Modern periodic table: Elements are arranged in groups and periods. Elements with similar properties are placed in the same group. Metals and non-metals are placed separately.

The major difference is that the elements in Mendeleev's periodic table were arranged by atomic mass and the modern periodic table arranges elements by atomic number. Of course as elements are constantly being discovered there were significantly fewer elements in Mendeleev's periodic table.

You might be interested in
Question 4 of 10
Fiesta28 [93]

Answer:

B is the answer

Explanation:

B is the most un reasonable answer to do at the BEGINNING of the process. All of the other answers are things you do at the beginning or, before you start it. "Decide whether they have designed the best possible product" means you FINISHED it already, and we want what the engineers needs to do at the beginning. Common sense actually. Your welcome.

<em>A friendly dude that likes to help</em>

7 0
3 years ago
Water molecules contain what type of bonds
Semenov [28]

Answer:

Hydrogen and oxygen bonds

Explanation:

8 0
3 years ago
Read 2 more answers
Describe the oxygen/carbon dioxide cycle using plants and animals.
Vikentia [17]

Answer:

The process of photosynthesis in plants releases oxygen into the atmosphere. Respiration by plants and animals, as they use the energy stored in food, and the process of decomposition of dead organisms, releases carbon dioxide into the atmosphere. All three work together to maintain the carbon dioxide-oxygen cycle.

5 0
3 years ago
1) If calcium were to combine with the compound barium nitrate, which member of the barium nitrate would calcium replace?
snow_tiger [21]

Answer:

Calcium would displace barium.

Explanation:

Ba(NO₃)₂ + Ca -->  Ca(NO₃)₂ + Ba

There are two types of compounds: molecular/covalent and ionic.

Molecular/covalent compounds are non-metal + non-metal.

Ionic compounds are metal + non-metal.

Looking at the periodic table, barium is a metal. Calcium is also a metal.

Checking a polyatomic ions chart would tell you NO₃⁻ is a non-metal because it has a negative charge.

Since there is no metal + metal compound, the calcium metal would displace barium. The compound remains ionic.

7 0
3 years ago
Which statements best describe plantesimals
miv72 [106K]

a minute planet; a body that could or did come together with many others under gravitation to form a planet. Planetesimals are small rock fragments that combined together to eventually form planets

4 0
3 years ago
Other questions:
  • An animal cell contains a nucleus and other organelles suspended in a watery solution that is encased in a flexible cell membran
    13·2 answers
  • Use the law of constant composition to complete the following table summarizing the amounts of iron and chlorine produced upon t
    9·2 answers
  • I NEED HELP PLEASE, THANKS!
    10·1 answer
  • Chemical reactions will occur if_____.
    5·1 answer
  • What nuclide would be produced from the positron emission of Co-56
    14·1 answer
  • A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g nh3. what is the percent
    5·2 answers
  • Which expression correctly describes activation energy in a chemical reaction?
    12·1 answer
  • Guys I know this is not an educational question, but guess what? &gt;.&gt;
    11·2 answers
  • ​Bbsbsjsjsjwjwjwjwjehhehehe
    9·1 answer
  • Be sure to answer all parts. an aqueous solution of a strong base has a ph of 10. 220 at 25°c. calculate the concentration of th
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!