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
4vir4ik [10]
3 years ago
9

Please help as fast as u can

Chemistry
2 answers:
pav-90 [236]3 years ago
6 0

Answer:D

D

DDD

DDDDDDDDDD

Explanation:

sveticcg [70]3 years ago
6 0

Answer:

C. 1 and 3 only

Explanation:

In this element representation';

The superscript (23) s the mass number. Mass Number = Protons + Neutrons

-The subscript (11) is the atomic number.

Atomic Number = Protons

This means;

Number of Protons = 11

Number of Neutrons = 23 - 11 = 12

Number of electrons = 11 (Since it is a neutral atom)

Also sodium belongs to group 1 hence number of outer electrons = 1

The correct option is;

C. 1 and 3 only

You might be interested in
Which physical method can separate a mixture of steel ball bearings and marbles
Lana71 [14]
Sorting is a method that could separate those materials

6 0
3 years ago
Read 2 more answers
Which of the following produces a chemical change?
Svetlanka [38]
Exposure to chemicals.
5 0
3 years ago
An element has an atomic number of 30. How many protons and electrons are in a neutral atom of the element? A. 30 protons, 30 el
Minchanka [31]
Atomic number shows the number of protons in an atom's nucleus. If the atomic number is 30, then it has 30 protons. The question says it is neutral, so it must have the same amount of protons and electrons.

A is the correct answer based on this. 
7 0
3 years ago
Which adaptation is likely to increase the chances of survival of an animal in a rainforest?
LiRa [457]
I know I think it’s a A

6 0
3 years ago
If the H+ in a solution is 1x10^-1 mol/L what is the OH-
damaskus [11]
PH scale is used to determine how acidic or basic a solution is.
we have been given the hydrogen ion concentration. Using this we can calculate pH,
pH = - log[H⁺]
pH = - log (1 x 10⁻¹ M)
pH = 1
using pH can calculate pOH
pH + pOH = 14
pOH = 14 - 1
pOH = 13
using pOH we can calculate the hydroxide ion concentration 
pOH = - log [OH⁻] 
[OH⁻] = antilog(-pOH)
[OH⁻] = 10⁻¹³ M
hydroxide ion concentration is 10⁻¹³ M
8 0
3 years ago
Other questions:
  • Explain the environmental benefits of recyling paper products.
    12·1 answer
  • In synthesis reactions, there are always more _____________ than ________________.
    12·1 answer
  • PLS ANSWER!! ASAP!! 10 POINTS!!
    9·1 answer
  • How many liters of 4.0 M NaOH solution will react with 0.60 liters 3.0 M H2SO4?
    11·1 answer
  • DNA replication takes place
    15·1 answer
  • A sample of matter was given the following description: The sample of the pure substance is blue in color with an octahedral sha
    15·1 answer
  • What type of bond would form between two atoms of selenium? A. Double ionic bond B. Single ionic bond C. Single covalent bond D.
    5·1 answer
  • Which of the following is in the correct order of boiling points for NaNO₃, CH₃OH, C₂H₆, and Ne?A) Ne < CH₃OH < C₂H₆ <
    10·1 answer
  • At what temperature does a gas at 1.00 atm and 20 degree Celsius have a pressure of 4.00 atm.
    6·1 answer
  • The molarity of a solution that contains 8.0 g of NaOH in a liter of solution is
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!