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
Arturiano [62]
3 years ago
10

In the 19th century, Dmitri Mendeleev predicted the existent of a then unknown element, X, with a mass of 68. He also predicted

that an oxide of X would have the formula X2O3, on the modern period table. What is the group number and period of the element?
Biology
1 answer:
stiks02 [169]3 years ago
4 0
Base on your question that in 19th century when Dmitri Mendeleev predicted the existent of an unknown element X with a mass of 68 and he also predicted that an oxide would have a formula X203 on the modern table i think the element that Mendeleev predicted is (GA) Gallium
You might be interested in
Which rhinoceros species is best adapted for feeding in the large open grasslands of Africa's Serengeti ecosystem?
zalisa [80]

Answer:

White Rhinoceros :)

Explanation:

4 0
3 years ago
Read 2 more answers
Rudolf is dealing with impending layoffs at work. yesterday, at a pharmacy, he measured his blood pressure and it was high. he a
Airida [17]

Physiological symptoms of stress

Stress plays aggravating role in diseases and it affects every parts of the body. Many emotional and physical disorders have been associated with stress including stroke, anxiety, hypertension, depression and many more. Stress symptoms can affect one’s health and can lead to other illnesses. For the question given above, Rudolf is demonstrating physiological symptoms of stress.






4 0
3 years ago
Students in a biology class conduct an experiment to determine the effect of temperature on the rate of photosynthesis in a plan
sleet_krkn [62]

Answer:

Explanation:

C. The rate of oxygen production is greatest in section M.

6 0
2 years ago
Each Taxonomy (category) gets less and less specific as they go further down the list.
ch4aika [34]

Answer:

B. False

Explanation:

The most specific level of classification is species and the least specific level of classification is kingdom.

5 0
3 years ago
Read 2 more answers
What are reserves? Thanksssssssssssssssssss
snow_tiger [21]

Answer:

refrain from using or disposing of (something); retain for future use.

Explanation:

4 0
3 years ago
Other questions:
  • The trophic levels of the energy pyramid above show that A. there is a great amount of energy lost as it travels up the energy p
    13·2 answers
  • A rabbit eats a carrot for food. What happens to the molecules of the food?
    15·1 answer
  • The harp seal lives on the polar ice sheets. Which adaptation makes it best suited for this environment?
    8·1 answer
  • Can some one help me out please
    5·1 answer
  • What is mitosis? first answer gets brainlist
    8·2 answers
  • Sally comes to the medical setting stating she has heartburn on a daily basis. She states that she has also been constipated.
    9·1 answer
  • What 3 types of molecules are examples of signal molecules?
    15·1 answer
  • You examine a cell by electron microscopy and find a molecule on the outside of the cell and in vesicles in the cytoplasm. The m
    10·1 answer
  • What is 80 multiplied by 80
    12·1 answer
  • What skills are needed to an Executive Director of Animal Research?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!