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
stepan [7]
2 years ago
6

Pls help and i will mark brainliest

Chemistry
2 answers:
myrzilka [38]2 years ago
6 0

Answer:

No. 3 lithium

Explain that lithium has 3 protons and 3 electrons. There are 2 electrons on the first energy level and 1 electron on the second

No. 4 Hydrogen (H) and helium (He) have a valence shell containing one and two electrons respectively. They make up the first period (row) of the periodic table. Their valence electron/s are in the first energy level (n=1) , as is denoted by 1s1 and 1s2 .

<em>That</em><em>'</em><em>s</em><em> </em><em>all</em><em> </em><em>i</em><em> </em><em>dont</em><em> </em><em>know</em><em> </em><em>if</em><em> </em><em>this</em><em> </em><em>is</em><em> </em><em>right</em><em> </em><em>though</em><em>.</em><em> </em>

Serjik [45]2 years ago
5 0
Sodium
Beryllium
Lithium
Helium
Potassium
Fluorine
You might be interested in
What is the ROUNDED atomic number for this elements?
denis-greek [22]
Sodium/Atomic number

11

Gold/Atomic number

79
Potassium/Atomic number

19

Silicon/Atomic number

14




8 0
2 years ago
Rain soaks into the soil or runs off into oceans, rivers, and lakes. ___________ which process is this
krok68 [10]

Answer:

The water falls to the earth as precipitation, such as rain, hail, sleet, and snow. When precipitation reaches the earth's surface, some of it will flow along the surface of the land and enter surface water like lakes, streams, and rivers, as runoff. The rest of it soaks or percolates into the soil, called

5 0
2 years ago
What type of flower is this? This is for a science project.
kenny6666 [7]

I believe that is a plant called Wisteria.

4 0
3 years ago
Read 2 more answers
A student has two substances at a lab table. One substance is iron pyrite (fool's gold) and the other is real gold. After placin
blagie [28]
The answer is A) 1 mL 
6 0
3 years ago
Read 2 more answers
How demanding is lime and cement in our world's economy?
Serggg [28]
<span> Cement products are essential for construction and civil engineering, while lime is irreplaceable for the steel industry, as well as construction materials, paints, plastics, and rubber.</span>
6 0
2 years ago
Other questions:
  • If you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have after 70 days?
    9·1 answer
  • Which statement describes the phrase change that occurs when dry ice is placed in an open container at room temperature
    7·1 answer
  • What is the approximate percentage of nitrogen in<br> the Earth's current atmosphere?
    12·1 answer
  • 17. When 1 mol of the following substances react completely with oxygen, the
    10·2 answers
  • The Dendrite Of Nerve Cells Send Or Receive Information?
    12·1 answer
  • Deep sea divers use a mixture of helium and oxygen to breathe. Assume that a diver is going to a depth of 150 feet where the tot
    5·1 answer
  • Suppose you were making 100.0 mL of a solution that is 0.040 M KCl. What mass of KCl should you weigh to make this solution?
    14·1 answer
  • Jello has a density of 1.14 g/mL. A box of Jello makes 475 mL of Jello and has 13 g of sugar. Determine the % m/m of sugar in th
    5·1 answer
  • BALANCE the following equations then write the NET IONIC EQUATION for each one: ____Ni(NO​ 3​ )​ 2​​(aq)​ + ____NaOH ​(aq)​ ​→ ​
    5·1 answer
  • Match the alkane names and structures.<br> -butane<br> -methane<br> -ethane<br> -propane
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!