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
Levart [38]
3 years ago
10

1. Which two groups of elements in the periodic table are the most reactive?(1 point) A) alkali metals and halogens B) alkaline

earth metals and halogens C)halogens and noble gases D)noble gases and alkali metals 2. Use the periodic table to answer the question. Which statement about nitrogen (N) and phosphorus (P) is correct? (1 point) A)They have the same number of valence electrons. B)They have the same number of electron shells. C)They are both classified as halogens. D)They are both inert. 3. Which property do transition metals have in common?(1 point) A)They usually have low densities. B)They are usually very soft. C)They are usually very reactive. D)They usually have high melting points. 4. Neon and argon are both in Group 18 of the periodic table. Which property do they most likely share?(1 point) A)low or no reactivity B)silver color C)strong odor D)metallic texture 5. A scientist studies an element that has seven electrons in its outer shell, is fairly toxic, and is highly reactive. To which group of the periodic table does this element belong?(1 point) A) 17 B) 1 C) 18 D) 2 PLEASEE HELP I NEED IT DONE BY TMR
Chemistry
1 answer:
tatyana61 [14]3 years ago
4 0

Answer:

Explanation:

1) alkali metals and halogens as alkalis have 1 electron they need to get rid of in order to gain a full outer shell of electrons and the halogens have to gain 1 electron.

2) they have the same number of electrons on the outer shells

3)they usually have high melting points

4) low or no reactivity

5) group 7

You might be interested in
10. How much protein one should obtain from diet<br> (1 gram, 3 gram,4gram)
jarptica [38.1K]

How much protein one should obtain from diet

Answer:

4 gram

7 0
3 years ago
Read 2 more answers
10 points please please help
Inga [223]

Your answer would be respiration. This would be your answer because, plants take in carbon dioxide, and animals, including humans, breath oxygen. I hope this had helped you out.

4 0
3 years ago
How many electrons in an atom with the atomic number of 45
Sergio039 [100]

Answer:

Number of Protons: 45

Number of Neutrons: 58

Number of Electrons: 45

Explanation:

Have a nice day

4 0
3 years ago
In this system, potential and kinetic energy are ________________ proportional.
brilliants [131]

Answer:

This question is incomplete

Explanation:

There are two major forms of energy; these are potential and kinetic energy. Kinetic energy is the energy present in moving options. Examples include mechanical and electrical energy.

The formula for kinetic energy is 1/2mv² where "m" is mass and "v" is velocity.

While potential energy is the energy present in stationary objects that can be put to use in future. Example includes a ball in its resting state. The formula for potential energy is "mgh" where "m" is mass, "g" is acceleration due to gravity and "h" is height

Considering the law of conservation of energy which states that energy can neither be created nor destroyed but can be transformed from one form to another. Looking at the example provided earlier for potential energy, a ball in its resting position (having a potential energy) when kicked will have a kinetic energy (which can be calculated with the formula provided earlier), hence

Total energy = potential energy (P.E) + kinetic energy (K.E)

This formula and the explanation above can be used to answer the completed question.

NOTE: There is no standard relationship between P.E and K.E. They could be directly or indirectly proportional depending on the circumstance.

5 0
3 years ago
Select the correct answer. When an atom in a reactant loses electrons, what happens to its oxidation number? A. Its oxidation nu
vfiekz [6]

Answer:

C. Its oxidation number increases.

Explanation:

  • <em><u>Oxidation is defined as the loss of electrons by an atom while reduction is the gain of electrons by an atom</u></em>.
  • Atoms of elements have an oxidation number of Zero in their elemental state.
  • When an atom looses electrons it undergoes oxidation and its oxidation number increases.
  • For example, <em><u>an atom of sodium (Na) at its elemental state has an oxidation number of 0. When the sodium atom looses an electrons it becomes a cation, Na+, with an oxidation number of +1 , the loss of electron shows an increase in oxidation number from 0 to +1.</u></em>
8 0
3 years ago
Read 2 more answers
Other questions:
  • The fact that gold is not brittle is a
    6·1 answer
  • Is shaving cream a constant for making fake snow?<br><br> U get 71 pts!
    13·1 answer
  • Calculate the amount of energy released by the freezing of 13.3 g of water
    9·1 answer
  • What is the name of an atom with 3 protons and 4 neutrons?
    5·2 answers
  • How many milliliters are in a half gallon?
    12·2 answers
  • When a horn is moving away from an observer the sound waves from it will pass by the observer____ frequently, causing the pitch
    8·1 answer
  • Why do particles settle down in suspension
    7·1 answer
  • Help me please i'm begging you its DUE today its super easy
    12·1 answer
  • Part 1: Fill in the blank<br> Newton’s Second Law: Unbalanced forces cause an object to ______.
    11·2 answers
  • How is a nuclear weapon engineered?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!