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
laiz [17]
3 years ago
5

These are the highly reactive elements located in Group 1 of the periodic table. These elements have one electron in their outer

energy level which makes them highly reactive with water and halogens.
Biology
1 answer:
cupoosta [38]3 years ago
5 0
"These" should be referring to Alkali Metals.

They include metals such as Lithium, Sodium, Potassium etc.
They're classified as Group I elements because they all have one outmost shell electrons. This is why these metals are so reactive because they only need to lose one electron in order to achieve the octet of electrons (or duplet for Lithium), which means complete outmost shell electrons (2 or the 1st shell, others are 8). 

The reason why they're especially reactive to Halogens (Group VII) elements are that Halogens have 7 outmost shell electrons, which only needs one more electron in order to get to the octet of electrons. So, if an Alkali metal reacts with a Halogen, the metal would give one of their electrons to the Halogen, that way, both of the elements can have an octet of electrons (or duplet).
You might be interested in
How does the motion of particles in the sun’s plasma compare to the motion of particles in a solid?
noname [10]
The answer is B took the test
3 0
3 years ago
Read 2 more answers
Which part of the nucleotide contains the element Nitrogen?
oksian1 [2.3K]

Answer:

The base, it is called a nitrogen base

Explanation:

3 0
3 years ago
Adults with more than a 12-month history of migraines were assigned randomly in a double-blinded study to receive treatment with
lyudmila [28]

Answer:

Phase III

Explanation:

The given condition fall in the trial phase (Phase III) of cinical study which aims to:

- Determine drug's effectiveness (primary goal)

- Determine long-term drug safety

- Confirm findings

In Phase III, randomised, double-blind, placebo-controlled, parallel group study is majorly to evaluate the efficacy and safety of placebo in episodic migraine prevention in children (6 to < 12 years of age) and adolescents (12 to < 18 years of age).  

The trial consists of four phases: screening; double-blind therapy period for 24 weeks in which placebo or Erenumab is given to subject as dose 1, dose 2 or dose 3 (based on the participant's body weight) once a month via subcutaneous injection; optional dose level blinded extension phase (40 weeks) which involves subjects recieve dose1, 2 and 3 of placebo, and at last it follows a safety follow-up phase for 12 weeks (after 16 weeks  of the last dose of investigational drug).

Hence, the clinical phase is phase III.

5 0
3 years ago
Describe three actions caused by the force of water that help drive the rock cycle.
dolphi86 [110]

Answer:

Explanation:

The rock cycle is driven by two forces: (1) Earth's internal heat engine, which moves ... enough to drive mantle convection and there is no atmosphere or liquid water. ... In describing the rock cycle, we can start anywhere we like, although it's ... Referring to the rock cycle (Figure 3.2), list the steps that are necessary to cycle

6 0
3 years ago
When the waters which once covered Indiana retreated, they left behind a bedrock layer of
stellarik [79]
Sedimentary, because of the glaciers that once covered Indiana they lithified which is a part of the rock cycle in the sedimentary division.
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the coefficient for hydrogen in the balanced equation for the reaction of solid iron(iii) oxide with gaseous hydrogen to
    11·1 answer
  • Chemical weathering would be most effective ________. in a warm, humid climate equally in any kind of climate in a cold, dry cli
    8·2 answers
  • Which of the following statements is not true? A. Sympathetic has extensive branching of preganglionic fibers; parasympathetic h
    8·2 answers
  • Science is
    8·1 answer
  • Classify each organism as a carnivore, or herbivore, or an omnivore: Buffalo Bear spider cow
    11·2 answers
  • Please what's an ecosystem​
    7·2 answers
  • If an organism's gametes contain 25 chromosomes, how many chromosomes will their somatic (body cells) contain?
    9·1 answer
  • One of the functions that related to the circulatory
    6·1 answer
  • What questions do you have about our origins? What clues in nature can we look for to investigate this mystery?
    11·1 answer
  • Science I need to know the answer
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!