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Ainat [17]
3 years ago
7

Which statements are true? Check all that apply.

Chemistry
1 answer:
Nat2105 [25]3 years ago
7 0

The answer fam is.......

Different land forms have different combinations of elevation and relief.

Elevation is the height of a feature above sea level.

Relief is the difference between the highest and lowest points in an area.

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Lithium oxide + hydrochloric acid please
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Does lithium oxide react with hydrochloric acid?

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Part 1: name two elements that have the same properties as sodium (na). (4 points) part 2: determine the number of protons, elec
Maslowich

  • Part 1: Two elements with the same properties as Sodium(Na) are Lithium(Li) and Potassium(K).
  • Part 2: Calcium(Ca) has 20 protons, 20 electrons and 20 neutrons.

  • Elements that have the same properties ( physical and chemical ) are usually found on the same group. A group ( also called family ) in chemistry, means a column or a vertical line of elements in the periodic table of elements. Elements in the same group are similar because they have the same number of electrons in their outermost shell. The two most common elements found in the same group as Sodium(Na) are Lithium(Li) and Potassium(K). All three elements are in Group 1, have 1 electron in their outermost shell and are highly electropositive.

  • The number of protons in any atom is always equal to the atomic number of that element, usually denoted by the letter Z. From the periodic table of elements, The atomic number of Calcium(Ca) is 20, so the number of protons will be 20. The number of electrons in any given atom is also equal to the number of protons in that atom, therefore the number of electrons in Calcium(Ca) is also 20. To find the number of neutrons, subtract the number of protons from the atomic mass as;                                                                       Atomic mass = Number of protons + Number of neutrons         Calcium(Ca) has an atomic mass of 40, so it's number of neutrons will be;                                                                                                         40 - 20 = 20 neutrons                                                                   Hence, Calcium(Ca) has 20 protons, 20 electrons, and 20     neutrons.

To know more about elements and the periodic table, go to;

brainly.com/question/14347616    

#SPJ4  

                                       

5 0
2 years ago
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