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
jenyasd209 [6]
3 years ago
14

NEED HELP ASAP!!!!!

Biology
1 answer:
Brilliant_brown [7]3 years ago
4 0

1. The right answer is electron.

The electron, one of the components of the atom with neutrons and protons, is an elementary particle that has an elementary charge of negative sign. It is fundamental in chemistry because it participates in almost all types of chemical reactions and is an essential element of the bonds present in molecules.

The mass of an electron is 9.109 × 10-31 kg. The electron is about 2000 times lighter than the proton and neutron in the nucleus. The masses of the proton and the neutron are almost identical (10-27 kg).

2. The right answer is rapidly moving electrons.

The chemical, physical and electrical properties of an atom are related to the number of protons in the nucleus, which determines the number of electrons in the electron cloud.

The electron cloud is formed of electrons rotating at high speed around the nucleus in very complex trajectories. The electronic cloud is composed of electrons so its electric charge is always negative.

3. The right answer is Atoms of the same element can have different numbers of neutrons.

Isotopes (of a certain chemical element) are called the nuclides sharing the same number of protons (characteristic of this element), but having a different number of neutrons.

So what characterizes an element is the number of protons.

By extension, isotope is often called a nuclide characterized by its number of protons Z and its number of neutrons N (or its mass number A = Z + N), but without distinction regarding its spin or energy state.

4. The right answer is 8.

The atomic number (Z) is the term used in chemistry and physics to represent the number of protons in an atom. An atom can be schematized as a first approach by a compact agglomeration (atomic nucleus) of protons (p +) and neutrons (n), around which circulate electrons (e-).

5. The right answer is 18.

The relative atomic mass (or atomic weight) is the mass of an atom in particular or a chemical element in general (in which case an isotopic mixture is envisaged) expressed as a multiple of a reference elementary mass that wants to be close to that of a single nucleon. Indeed the mass of an atom is proportional in first approximation to the number of its nucleons (protons and neutrons), said number of mass.

You might be interested in
<img src="https://tex.z-dn.net/?f=%5Csmall%5Cbold%5Ccolor%7Bviolet%7D%7BNeed%20%5C%3A%20help%20%5C%3A%20here%20%5C%3A%20plss%7D"
forsale [732]

Answer:

13 - D

14 - D

15 - C

Explanation:

for 13

A molecule is two or more atoms chemically combined

An example would be carbon dioxide which contains the two atoms, carbon and oxygen

Reasons its not the other answers:

Electrons, Protons and Neutrons are all parts of an atom therefore they cannot be classified as molecules.

For 14

Remember an atom is the most basic unit out of the units we are talking about

The answer would be D

Reasons its not the other answers

Water is considered to be a molecules as it contains two or more atoms (hydrogen and oxygen)

Air is considered to be a mixture as it contains oxygen and nitrogen which can be separated

Salt is considered to be a compound because salt is made up of two atoms (chloride and sodium) in which they are held up by an ionic bond

For 15

The answer would be C (III only)

Carbon hydrogen and oxygen all happen to by atoms

Reasons its not other answer choices:

Like stated previously water is considered to be a molecule therefore we can eliminate the other answer choices

Other notes:

Compounds and molecules both are combinations of two or more atoms however they are not to be mixed together

the main difference between compounds and molecules is how they are held together

Compounds are held together by ionic bonds while molecules are help up by covalent bonds

compounds and molecules  are made up of atoms that cannot be separated

Mixtures - A mix of two or more substances that can be separated

3 0
3 years ago
HELP ASAP PLEASE…………….
saveliy_v [14]
<h3>A. Cellulose  ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎</h3>
7 0
3 years ago
Which is part of Charles Darwin's reasoning for evolution by natural
DedPeter [7]

Answer:

it will option C this is correct answer

6 0
3 years ago
What two things can you tell from each word of an air masses' name?
olchik [2.2K]

Answer:

<em>Option</em><em> </em><em>A)</em><em> </em><em>humidity</em><em> and</em><em> </em><em>temperature</em>

3 0
3 years ago
A trait has two alleles represented by p and q if p 0.22 what is q
pav-90 [236]
q=0,78  
To calculate the frequency of the allele we use the Hardy-Weinberg equation. The Hardy-Weinberg equation is used to calculate the genetic variation of a population at equilibrium. If the alleles are A and a, p is the frequency of the allele A and q is the frequency of the allele a. Hardy-Weinberg equation for alleles A and a:
p² + 2pq + q² = 1
p² is the frequency of the homozygous genotype AA, 2pq is the frequency of the heterozygous genotype Aa and q² is the frequency of the homozygous genotype aa.
p²+2pq+q²=(p+q)²=1
p+q=1
<span>If p=0,22 q=1-0,22=0,78</span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • Humans are vulnerable to the forces of nature. Which description is an example of a conflict and resolution that best supports t
    14·2 answers
  • An exocrine gland that has an unbranched duct would be classified as a __________.
    13·1 answer
  • Classify the following organisms into their respective kingdoms (i) Yeast (ii) Penicillium (iii) Rhizobium (iv) Mushroom (v) Amo
    10·1 answer
  • How do aerobic and anaerobic respiration differ?
    7·1 answer
  • Which organelle is not found in plant cells?
    9·2 answers
  • How do wetlands reduce flooding and erosion? (Site 1)
    11·2 answers
  • What Are the necessary parts of a sound source model?<br>​
    13·1 answer
  • PLEASE HELP
    13·1 answer
  • Which factor would increase the food security of a community?
    5·2 answers
  • Please help me with this
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!