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
Troyanec [42]
3 years ago
15

. What is the first element on the periodic table?

Chemistry
1 answer:
melamori03 [73]3 years ago
6 0

Answer:

The first element in the periodic table is hydrogen.

Explanation:

Hydrogen has an atomic number of one, making it the first element of the periodic table. The atomic number of an element is just the number of protons in the nucleus, so hydrogen has one proton. The neutrons and electrons do not affect the atomic number. After hydrogen with one proton comes helium with two, lithium with three, beryllium with four, and so on.

You might be interested in
One quarter of a 1-mole piece of iron turns to rust in six months. Which rate describes the speed at which the iron rusts?
avanturin [10]
1/4 mol = 0.25 mol

6 months = 0.5 year

rate = 0,25 mol / 0.5 year = 0.5 mol/year or approx 0.042 mol/month
7 0
4 years ago
Read 2 more answers
What are Rhodium isotopes used for?
Lina20 [59]

Answer:

Rhodium is used to make electrical contacts, as jewelry and in catalytic converters, but is most frequently used as an alloying agent in other materials, such as platinum and palladium. These alloys are used to make such things as furnace coils, electrodes for aircraft spark plugs and laboratory crucibles.

Explanation:

4 0
3 years ago
The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change?
liberstina [14]

Answer:

It increases by a factor of eight

Explanation:

When temperature is held constant, gas pressure changes according the volume, in undirectly proportion.

Volume increases →  Pressure decreases

Volume decreases → Pressure increases

As volume gas, was reducted from 4L to 0.5L, it was reduced by 1/8, so the pressure gas was increased by a factor of eight.

5 0
3 years ago
At each step, a dichotomous key involves how many choices
kvasek [131]
Two, hope this helps
8 0
4 years ago
Read 2 more answers
Select the correct answer.
erastova [34]

Scientific law

Explanation:

A scientific law is a term that refers to a fact that naturally occurs in the universe.

Scientific laws are natural laws and they hold true.

  • Scientific law is a well tested idea that holds through for a range of natural events.
  • Scientific theories are explanations of phenomenons drawn from series of tests.

Learn more:

experiment brainly.com/question/5096428

#learnwithBrainly

3 0
3 years ago
Other questions:
  • To a 0.0001 m solution of mg(no3)2, naoh was added to a final concentration of 0.001m did a precipitate form?
    7·1 answer
  • What substance takes part in an enzymatic reaction, but is unchanged by the reaction?
    12·1 answer
  • HHHHHEEEELLLLLPPP PPPLLEEASEEE I GIVE BRAINLIEST!!!!!!!!!
    5·1 answer
  • The following information is given for benzene, C6H6, at 1atm: boiling point = 80.1 °C Hvap(80.1 °C) = 30.7 kJ/mol specific heat
    9·1 answer
  • The incredible catalytic power of enzymes can perhaps best be appreciated by imagining how challenging life would be without jus
    6·1 answer
  • Which of the following is an anion of 14N?<br> 14N5+<br> 14N3-<br> 15N
    5·1 answer
  • Which of the following is a nonrenewable energy source? O A. Solar B. Hydroelectric C. Natural gas D. Biomass
    8·1 answer
  • Janet runs 6.4 miles in one hour. Is it speed or velocity or acceleration
    14·1 answer
  • Which of the following shows a chemical reaction in which hydrogen sulfide and oxygen are the reactants and sulfur and water are
    5·1 answer
  • What is the difference between a substance that low concentration and one high concentration
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!