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
ra1l [238]
3 years ago
10

Among the alkali metals, the tendency to react with other substances. A. does not vary among the members of the group. . B. incr

eases from top to bottom within the group. . C. varies in an unpredictable way within the group. . D. decreases from top to bottom within the group.
Chemistry
1 answer:
yKpoI14uk [10]3 years ago
8 0
B is correct. As you move down group 1, the elements become more reactive with other elements because the electrons have a weaker attraction to their own atoms nucleus which means attraction with other elements is much stronger, making the atom more reactive.
You might be interested in
Jerry designed a coat that he thinks could keep people dry during a thunderstorm. He created a prototype that looks just like hi
AlekseyPX

Answer:

The next step is prototype testing

Explanation:

The stages of the design process are;

1) Situation analysis

Paper based research is conducted on the situation to obtain the situation parameters

2) Brief writing

With the situation analysis developed above, the brief of the current situation is put down on paper

3) Problem research

The problem is researched and experimented on with the development of a paper based proof of the possible concept

4) Specification writing

The specifications of the problem are outlined

5) List the possible solutions

The possible solutions are brainstormed and listed

6) Preferred solution selection

The preferred solution is selected based on the constraints in the situation

7) Create working drawing/plan

The working design drawing of the selected solution or concept is completed and evaluated for applicability

8) Building of a prototype

The design is converted into a prototype which is a model of the actual solution

9) Testing of the prototype

The prototype is tested for functionality, for ability to work in the intended situation and/or in the intended system

10) Report writing

A report is made on the outcome of the tests for review before production

Therefore, after the prototype is created, stage 8, the next step is the testing of the prototype stage 9.

5 0
3 years ago
∆G° for the reaction of nitrogen with hydrogen to produce ammonia (see balanced chemical equation below) has a value of -33.3 kJ
Juliette [100K]

Answer:

-0.85KJ

Explanation:

Given N2(g) + H2(g) <--->2NH3(g)

Kp =[ P(NH3)]²/[P(H2)]³[P(N2)]

Where P is the pressure of the gas

P(H2)b= P(N2) = 125atm

P(NH3) = 200atm

Kp = 2²/(125)³(125)

Kp = 2.048 ×10^-6

∆G = -RTlnKp

R =0.008314 J/Kmol

T = 25 +273/= 298k

= 8.314 ×10^-3 × 298 × ln(2.048 ×10^-6)

= -0.008314 × 298 × (-13.099)

= 32.45KJ

∆G = ∆G° + RTlnKp

∆G = -33.3 + 32.45

∆G = -0.85KJ or -850J

3 0
4 years ago
What does an increase of 1 pH number represent?
Gennadij [26K]

Answer: B

Explanation:

5 0
3 years ago
Read 2 more answers
How many grams of potassium cyanide would be needed to make a saturated solution for the volumes indicated below? The solubility
lesya692 [45]
You will need 75.0ml grams of potassium cyanide
6 0
3 years ago
HELP PLEASE!! IF YOU DO AND ANSWER CORRECTLY YOU WILL GET A BRAINLIEST 5 STARSSSS AND A THANKS!! PLEASE PLEASE HELPPP
gladu [14]
1.) publish a journal that is verified by other scientists
2.) present at conferences
3.) present at universities
4.) inform popular media’s
5.) show data
6.) show hypothesis
7.) and give a theory
4 0
3 years ago
Other questions:
  • W = m·g is a form of Newton's ______ Law.<br><br> A)first<br><br> B)second<br><br> C) third
    7·1 answer
  • What is the molar mass of Fe3(PO4)2?
    14·1 answer
  • Members of which group easily lose an electron to form a +1 cation?
    6·1 answer
  • How many molecules of As4010 are in 6.2 mol of As4010?
    9·2 answers
  • During a strenuous soccer game, a student is sweating a lot. Which of these would help her maintain her water balance?
    13·1 answer
  • K2HPO4 is a highly water-soluble salt. It can be used as a buffering agent, food additive, or
    11·2 answers
  • What is the atomic mass of element XX if 3.6 moles of the substance has a mass of 192 grams?
    9·1 answer
  • - A compound contains 4.56g. of Pb, 2.3g Cl, and 3.1g 0. What is the percent
    9·1 answer
  • Which of these is NOT true about the outer core? Question 4 options: It is mostly made up of iron and nickel. It is mostly liqui
    8·1 answer
  • How does the sun affect evaporation?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!