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avanturin [10]
4 years ago
10

What family does Eu element belong to?

Chemistry
1 answer:
worty [1.4K]4 years ago
5 0
Row 6 - it’s called Rare earth elements
found in lanthanide series.
Hope this Help
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J.J. Thomson discovered the electron by noticing that: A. molecules with the same atoms exhibited the same chemical properties.
Slav-nsk [51]

J.J. Thomson discovered the electron by noticing that a beam of particles could be influenced by an electric or magnetic force and is denoted as option B.

<h3>What is an Electron?</h3>

This is referred to a subatomic particle which has a negative charge present and is involved in chemical reactions.

J.J. Thomson noticed that cathode rays were negatively charged due to deflection by magnetic and electric forces which signifies the presence of a negative particle.

Read more about J.J. Thomson here brainly.com/question/15361325

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2 years ago
PI3<br><br> trigonal planar<br><br> trigonal pyramidal<br><br> tetrahedral
EleoNora [17]
  1. The bond polarities of a molecule of ammonia (NH₃) are <u>polar</u>.
  2. The molecular shape of a molecule of ammonia (NH₃) is <u>trigonal pyramidal</u>.
  3. The molecule of a molecule of ammonia (NH₃) is <u>polar</u>.

<h3>The types of covalent bond.</h3>

In Chemistry, there are two (2) main types of covalent bond and these include the following:

  • Polar covalent bond.
  • Non-polar covalent bond.

<h3>What is electronegativity?</h3>

Electronegativity can be defined as the ability or tendency of the atom of an chemical element to attract any shared pair of electrons.

In Chemistry, the difference in electronegativity between an atom of nitrogen (N) and hydrogen (H) causes electrons to preferentially orbit an atom of nitrogen (N), thereby, making the bond polar.

Furthermore, the molecular shape of a molecule of ammonia (NH₃) is <u>trigonal pyramidal</u> and the molecule of a molecule of ammonia (NH₃) is <u>polar</u>.

Read more on bond polarities and electronegativity here: brainly.com/question/12789975

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<u>Complete Question:</u>

Describe the characteristics of a molecule of ammonia (NH3). The Lewis structure and table of electronegativities are given.

The bond polarities are BLANK 1, the molecular shape is BLANK 2, and the molecule is BLANK 3.

blank 1 options: nonpolar, polar

blank 2 options: bent, linear, tetrahedral, trigonometry planar, trigonal pyramidal.

Blank 3 options: nonpolar, polar

3 0
2 years ago
Due to radioactive decay over many millions of years, it is possible for the element uranium to decay in
Serjik [45]

The uranium within these items is radioactive and should be treated with care. Uranium's most stable isotope, uranium-238, has a half-life of about 4,468,000,000 years. It decays into thorium-234 through alpha decay or decays through spontaneous fission.

8 0
3 years ago
What is a ionic compounds usual state at room temperature
lianna [129]

Answer:

Solid

Explanation:

5 0
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How to convert from mass to atoms
Ivanshal [37]

Answer:

Explanation:

Divide mass in grams by atomic weight and then multiply it by Avogadro's number

No:of atoms=(m÷M)×NA

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