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sattari [20]
3 years ago
10

Why can lunar eclipses pose a challenge to spacecraft aloft in Earth's orbit?​

Chemistry
1 answer:
Viktor [21]3 years ago
4 0

Answer:

becose of the dark in the atmosphere it covers the sun

Explanation:

il explain in comment if you brainly me

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vredina [299]
Better picture? you ksksmskakakaoa
5 0
3 years ago
Generally how does the first ionization energy vary as the atomic number increases going across a period
Vlad1618 [11]

Across a period I.E increases progressively from left to right

Explanation:

The trend of the first ionization energy is such that across a period I.E increases from left to right due to the decreasing  atomic radii caused by the increasing nuclear charge. This not compensated for by successive electronic shells.

  • Ionization energy is a measure of the readiness of an atom to lose an electron.
  • The lower the value, the easier it is for an atom to lose an electron.
  • Elements in group I tend to lose their electrons more readily whereas the halogens hold most tightly to them.
  • The first ionization energy is the energy needed to remove the most loosely bonded electron of an atom in the gaseous phase.

Learn more:

Ionization energy brainly.com/question/6324347

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3 0
4 years ago
Which two ions have the same electron configuration?
djverab [1.8K]

Answer: A) Na+ and O2-

Explanation:

To know the electronic configuration, one has to determine the numbers of electrons present in each atom.

Na+ means a sodium atom that has lost one valence electron. A Sodium atom  initially has 11 electrons, but having lost an electron making it 10 electrons remaining with electron configuration of 1s2 2s2 2p6.

O2- means oxygen atom that has gained two valence electrons. An oxygen atom  initially has 8 electrons, having gained two electrons makes it 10 electrons with electron configuration of 1s2 2s2 2p6. same as Na+

The purpose of gaining or losing electrons is to attain a stable duplet or octet structure.

4 0
3 years ago
Read 2 more answers
H₂SO₄ is considered to be
uranmaximum [27]

Answer:

sulfuric acid

Explanation:

a strong acid that soluble in water.

6 0
3 years ago
What is the density of marble that has a mass of 4.3 g and a volume of 2.7 cm?
KiRa [710]

Explanation:

density(d) = mass(m) × volume(v)

given:

mass = 4.3 g = 0.0043 Kg

volume = 2.7 cm³ = 0.027 m³

= 0.0043 Kg / 0.0027 m³

= 0.15 Kg/m³

3 0
3 years ago
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