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
Mazyrski [523]
3 years ago
5

What is an element of calcium?

Biology
2 answers:
REY [17]3 years ago
6 0

Answer:

symbol :Ca

atomic number :20

- Calcium is a silvery-white, soft metal that tarnishes rapidly in air and reacts with water. Calcium metal is used as a reducing agent in preparing other metals such as thorium and uranium. It is also used as an alloying agent for aluminium, beryllium, copper, lead and magnesium alloys.

Explanation:

calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. ... It is the fifth most abundant element in Earth's crust and the third most abundant metal, after iron and aluminium.

Sunny_sXe [5.5K]3 years ago
3 0

Answer:

Calcium is a chemical element with the symbol Ca and atomic number 20.

Explanation:

You might be interested in
How does one determine when an ecosystem is in balance
liubo4ka [24]
An ecosystem<span> is </span>balanced<span> when the natural animals and plants and non-living components are in harmony- i.e. there is nothing to disturb the </span>balance<span>. With increasing pollution, change in migratory patterns, and rise of human population, many </span>ecosystems<span> are in danger of losing that harmony.</span>
8 0
3 years ago
Read 2 more answers
How many years does it typically take for the ecosystem to become balanced
erica [24]

About 30. thankyou and goodluck

5 0
3 years ago
What have the scientific studies identified as the major cause of acid rain in the united states?.
Vadim26 [7]

Burning of fossil fuels that release sulphur and nitrogen compounds into the air is identified as the major cause of acid rain in the united states.

<h3>What are the causes of acid rain?</h3>
  • Acid Rain is created when sulphate and nitrogen oxides from the atmosphere react with rainwater and fall as a result.
  • Sulphur and nitrogen particles that mix with the wet elements of rain are the main causes in the production of acid rain.
  • Due to air pollutants, notably the excessive levels of sulphur and nitrogen released by machinery and industrial operations, acid rain is made up of water droplets that are extremely acidic.
  • The emissions that are released from industries are man-made causes.
  • The natural causes, such as lightning strikes in the atmosphere that release nitrogen oxides and volcanic eruptions that release sulphur oxide.

The complete question is :

What have the scientific studies identified as the major cause of acid rain in the United States?

a )chemicals still in the atmosphere from the asteroid collision with the earth

b) excess solar radiation due to the depletion of the ozone layer

c) volcanic ash in the air

d) burning of fossil fuels that release sulphur and nitrogen compounds into the air

To learn more about acid rain , refer:

brainly.com/question/6700006

#SPJ4

3 0
1 year ago
Conduct an investigation to provide evidence that living things are
Solnce55 [7]

Answer:

In Late 1600s Anton von Leeuwenhoek develops a more powerful microscope that allows him to see living cells like bacteria.

In Early 1800s Matthias Schleiden and Theodor Schwann conclude that all living organisms are made of cells, and that cells can be produced from other cells.

Explanation:

4 0
2 years ago
In order for a child to inherit a recessive genetic disease like sickle cell anemia, healthy parents must both A. have the disea
schepotkina [342]
C. 
A is incorrect because if they have the disease then they cannot be healthy.
B is incorrect because if the genetic disease is recessive then the cannot have the homozygous mutated gene because then it would mean that they are ill.
D is incorrect because having an offspring that is ill doesn't always guarantee that all the offspring will be ill. <span />
4 0
3 years ago
Other questions:
  • Death rates for diarrheal disease are ___ times greater in adults over 74 years old
    11·1 answer
  • Which of the following is an advantage of single cell recordings
    11·1 answer
  • What will happen to the weight of an object as gravity increases?
    9·2 answers
  • ________is the structural and functional unit of all living organisms
    8·1 answer
  • some microbiologists recommend inoculating a pair of OF basal media (without carbohydrate) along with the carbohydrate media. Wh
    6·2 answers
  • Sarah and John are having a discussion on genetic diversity. Sarah believes that it happen over a long period of time. John it h
    12·1 answer
  • Volcanoes release sulfur dioxide gas. Sulfur dioxide gas can lead to and air pollution.
    10·1 answer
  • The organism Feline domesticus is a member of the genus:
    13·1 answer
  • What are some similarities between a sea slug and a spotted salamander
    15·1 answer
  • Establish the proper summary of the impact mutations have on genetic variation
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!