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NikAS [45]
3 years ago
12

What is the smallest unit of an element called

Chemistry
2 answers:
steposvetlana [31]3 years ago
8 0
The smallest unit of an element is called an Atom. An atom consists of protons, neutrons, and electrons.
raketka [301]3 years ago
8 0

<em><u>Atom is the smallest unit of an element. </u></em><em> </em>The atom is unit of matter, or its the smallest unit of an element. Hope this helps! Thank you for posting your question. Have a great day! -Charlie

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Inside a room, the air is often warmer near the ceiling then near the floor. Which of the following accounts for this difference
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The correct answer is C. convection
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2 years ago
Which is most likely why many scientist reject the cold fusion theory
spin [16.1K]

Answer:

There is too much waste involved in the process. Cold fusion experiments have been conducted at room temperature only. The process does not produce enough energy to meet the needs of modern humans.

7 0
3 years ago
Which of these is an isoelectronic series? question 7 options: 1) na+, k+, rb+, cs+ 2) k+, ca2+, ar, s2– 3) na+, mg2+, s2–, cl–
-BARSIC- [3]
An isoelectronic series is where all of the ions listed have the same number of electrons in their atoms. When an atom has net charge of zero or neutral, it has equal number of protons and electrons. Hence, it means that the atomic number = no. of protons = no. of electrons. If these atoms become ions, they gain a net charge of + or -. Positive ions are cations. This means that they readily GIVE UP electrons, whereas negative ions (anions) readily ACCEPT electrons. So, to know which of these are isoelectronic, let's establish first the number of electron in a neutral atom from the periodic table:

Na=11; K=19; Rb=37; Cs = 55; Ca=20; S=16; Mg=12; Li=3; Be=4; B=5; C=6, Ar = 18

A. Na⁺: 11-1 = 10 electrons
     K⁺: 19 - 1 = 18 electrons
     Rb⁺: 37-1 = 36 electrons

B. K⁺: 19 - 1 = 18 electrons
    Ca²⁺: 20 - 2 = 18 electrons
    Ar:  18 electrons
    S²⁻:  16 +2 = 18 electrons

C. Na⁺: 11-1 = 10 electrons
    Mg²⁺: 12 - 2 = 10 electrons
     S²⁻:  16 +2 = 18 electrons

D. Li=3 electrons
    Be=4 electrons
    B=5 electrons
    C=6 electrons

The answer is letter B.
6 0
3 years ago
What is the formula for manganese(III) oxide?<br> Explain.
Naddik [55]

Answer:

Mn2O3

Explanation:

Manga has a 3+ charge and oxygen has a 2- charge so to balance the charges there needs to be 3 oxygens for every 2 manga

6 0
2 years ago
What is the correct formula for selenium hexachloride?
labwork [276]

Answer:

Selenium hexachloride is SeCl6.

Explanation:

3 0
2 years ago
Read 2 more answers
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