3.02 Atomic Mass and Numbers TGA Helium 2 He 4.0026 1. What is the atomic mass or Helium?

2. How many protons are in Hellum?

3. What is the atomic number of Helium?
4. All atoms of the same element have the same number of
5. What particle in an atom determines what element it is?
6.What is the difference between a group and a row on the periodic table?
7.Name a nonmetal in the same group as lead.
8. Elements in the periodic table are listed in order of their
9. Which of the following is abbreviation for the element of gold?
10. How many protons does titanium have

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.

weathering is the answer.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.