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kherson [118]
3 years ago
8

Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chem

ical reactivity of two metals?
Rubidium (Rb) is more reactive than strontium (Sr) because strontium atoms must lose more electrons.
Sodium (Na) is more reactive than magnesium (Mg) because sodium atoms must gain more electrons.
Calcium (Ca) is less reactive than potassium (K) because potassium atoms must lose more electrons.
Beryllium (Be) is less reactive than lithium (Li) because beryllium atoms must gain more electrons.
Physics
1 answer:
ExtremeBDS [4]3 years ago
7 0

Answer:Rubidium or answer 1

Explanation:took quiz

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Which of the following phases of water has a definite volume but not a definite shape?
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Answer:

Gas

Explanation:

Cos Milky Said it. Milky Smart.

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The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of Q is located at one of the corn
tester [92]

Answer:

12.0 V

Explanation:

Data :

Potential difference due to a single charge (+Q), E = 3.0 V

 

The Electric potential for the system of charges is given as:

E=\frac{1}{4\pi \epsilon_o}[\Sigma\frac{Q}{r}]

for single charge, E = 3.0 V = \frac{1}{4\pi \epsilon_o}[\frac{Q}{r}]  ->eq(1)

And for 4 charges:

E=\frac{1}{4\pi \epsilon_o}[4\frac{Q}{r}] -eq(2)

from eq(1) and (2) we have

E = 4 × 3.0 V = 12 V

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3 years ago
Need help with getting the answer!
wlad13 [49]

Answer:

D. Salt Weathering

Explanation:

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3 years ago
A bowling ball is far from uniform. Lightweight bowling balls are made of a relatively low-density core surrounded by a thin she
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Answer:

Part a)

I = 17.4 \times 10^{-3} kg m^2

Part b)

I = 14.9 \times 10^{-3} kg m^2

Explanation:

Part a)

Moment of inertia of the core of the ball

I_1 = \frac{2}{5}m_1r_1^2

I_1 = \frac{2}{5}(1.6)((\frac{0.196}{2})^2)

I_1 = 6.14 \times 10^{-3} kg m^2

now the moment of inertia for thin shell

I_2 = \frac{2}{3} m_2r_2^2

I_2 = \frac{2}{3}(1.6)((\frac{0.206}{2})^2)

I_2 = 11.3 \times 10^{-3} kg m^2

now total inertia of the ball is given as

I = I_1 + I_2

I = 17.4 \times 10^{-3} kg m^2

Part b)

Moment of inertia of uniform ball of mass 3.2 kg

I = \frac{2}{5} mr^2

I = \frac{2}{5}(3.2)((\frac{0.216}{2})^2)

I = 14.9 \times 10^{-3} kg m^2

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What is different about the<br> electrons in metals when<br> compared to other materials
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Answer:

The metals create an electron cloud that makes a metal have a magnetic field

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