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
MatroZZZ [7]
3 years ago
7

How many protons and electrons does Calcium have?

Biology
1 answer:
alexandr402 [8]3 years ago
3 0

Answer:

Ca has 20 protons, so neutral it would have 20 electrons, but according to the charge, 2 electrons have been lost.

Explanation:

You might be interested in
The flower is called a "producer" and a frog is called a "consumer" because___________________________________________
Sphinxa [80]
The flower is called a producer because it produces its own food. The frog is a consumer because it needs to eat other plants to get its food and does not make its own.
3 0
3 years ago
If no new rock is deposited in this area, what will likely happen to the top layer of rock over time?
adoni [48]

Answer:

The answer is (C) :P 211111111

5 0
3 years ago
Which statement describes one way the female reproductive system is DIFFERENT from the male reproductive system?
balu736 [363]

Sorry, I don’t know what your options would be, but I would say that the female reproductive organs are INTERNAL and the male reproductive organs are EXTERNAL

8 0
3 years ago
Can you help me with biology?
ahrayia [7]

Answer:

1: 46

2: skin?

3:21

4:2nd one

5: last one

4 0
3 years ago
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional
myrzilka [38]

Answer:

Air pollution harms human health and the environment. In Europe, emissions of many air pollutants have decreased substantially over the past decades, resulting in improved air quality across the region. However, air pollutant concentrations are still too high, and air quality problems persist. A significant proportion of Europe’s population live in areas, especially cities, where exceedances of air quality standards occur: ozone, nitrogen dioxide and particulate matter (PM) pollution pose serious health risks. Several countries have exceeded one or more of their 2010 emission limits for four important air pollutants. Reducing air pollution therefore remains important.

Air pollution is a local, pan-European and hemispheric issue. Air pollutants released in one country may be transported in the atmosphere, contributing to or resulting in poor air quality elsewhere.

Particulate matter, nitrogen dioxide and ground-level ozone, are now generally recognised as the three pollutants that most significantly affect human health. Long-term and peak exposures to these pollutants range in severity of impact, from impairing the respiratory system to premature death. Around 90 % of city dwellers in Europe are exposed to pollutants at concentrations higher than the air quality levels deemed harmful to health. For example, fine particulate matter (PM2.5) in air has been estimated to reduce life expectancy in the EU by more than eight months. Benzo(a)pyrene is a carcinogenic pollutant of increasing concern, with concentrations being above the threshold set to protect human health in several urban areas, especially in central and eastern Europe.

"Air pollution is causing damage to human health and ecosystems. Large parts of the population do not live in a healthy environment, according to current standards. To get on to a sustainable path, Europe will have to be ambitious and go beyond current legislation."

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What digestive substances are bound to the microvilli of columnar epithelial cells of the small intestine?
    11·1 answer
  • A _____ is a 2- to 6-base-pair repeated sequence in dna.
    11·2 answers
  • During inspiration thoracic cavity volume increases. <br> a. True <br> b. False
    6·1 answer
  • Where is the insertion of the sartorius?
    14·1 answer
  • Researchers investigating the regulation of neurotransmitter release from presynaptic neurons proposed a model in which CDK5, a
    11·1 answer
  • Both plants and animals share two broad characteristics of what?
    12·1 answer
  • Explain this statement, cells are the basic units of structures and function in organisms
    8·2 answers
  • Which viral reproduction is active and takes over the process of protein synthesis to produce new viruses?
    6·1 answer
  • Having two alleles for the same trait
    7·1 answer
  • What statements are true about the biological macromolecules?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!