The ____________________ Era accounts for most of the history of Earth.

Chemistry

2 answers:

Slav-nsk [51]3 years ago

6 0

Pretty sure it's the Precambrian.

balandron [24]3 years ago

4 0

Yup! It's the Precambrian! :)

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What 6 elements in the periodic table are named after real people?

Romashka [77]

Curium (Cm, 96) – Pierre and Marie Curie einsteinium (Es, 99) – Albert Einsteinfermium (Fm, 100) – Enrico Fermigallium (Ga, 31) – both named after Gallia (Latin for France) and its discoverer, Lecoq de Boisbaudran (le coq, the French word for 'rooster' translates to gallus in Latin)hahnium (105) – Otto Hahn (Dubnium, named for Dubna in Russia, is the IUPAC-accepted name for element 105)lawrencium (Lr, 103) – Ernest Lawrencemeitnerium (Mt, 109) – Lise Meitnermendelevium (Md, 101) – Dmitri Mende

obelium (No, 102) – Alfred Nobelroentgenium (Rg, 111) – Wilhelm Roentgen (formerly Ununumium)rutherfordium (Rf, 104) – Ernest Rutherford seaborgium (Sg, 106) – Glenn T. Seaborg

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3 years ago

What do the conclusions tell about the experiment?

Blababa [14]

Answer:

Option C

Explanation:

When you perform a experiment to test your hypothesis (your educated guess on what you think will happen) you complete trials to find data that is reliable and valid so you are only getting the best possible results. After you complete the experiment you write your conclusion which is when you take the data and you say if the data supported your hypothesis, if you did guess correctly at the beginning of the experiment. Which means the answer is option C "the conclusions tell why the data support or reject the hypothesis."

Hope this helps.

3 0

2 years ago

A student is asked to identify an element that contains 2 valence electrons and is inert (stable). At which location in this per

krek1111 [17]

Answer:

i think the answer is helium (top right in periodic table)

6 0

2 years ago

I'd really appreciate help- this is due in around 8 hours :"D

Fed [463]

Answer:

atomic #= 1

protons equals one
Number of neutrons equals to 0
number of electrons equal to 1
mass number equals to 1

atomic number equals to 1
Protons equals to 1
number of neutrons equals to 0
number of electrons equals to 0 because the plus sign means that it loses an electron
mass number equals to 1

atomic number 17
number of protons 17
number of neutrons 18
number for electrons 18 Because negative sign means It's an anion which means it gains an electron
mass number 35

12
12
12
10 loses 2 its a cation
24

47
47
108-47 = 61
46 loses 1
108

16
16
32-16 =16
18 it gains 2 electrons
32

there u go

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3 years ago

When dissolving gases in water, the amount dissolving (decreases, does not change, increases) when the pressure is increased?

algol13

Increasing because more is being forced into liquid phase

4 0

4 years ago