Chemistry, 01.09.2019 13:00, clintonskippings

Which of the following statements about transition metals is true? . a.. they are never found uncombined in nature.. b.. they include familiar metals such as gold, silver, copper, and nickel.. c.. they are so soft that they can be cut with an ordinary knife.. d.. they are the most reactive of all the types of metals.

Answers: 2

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The answer is B.

Reason why choice A is wrong: Metals like Copper, Silver and Gold are transition metals that are found uncombined naturally. This is because they are unreactive and are placed at the bottom of the reactivity series.

Reason why I chose B as the correct You can find Gold, Silver, Copper and Nickel in the periodic table under transition metals.

Reason why choice C is wrong: ONLY Group 1 metals ( Alkali Metals ) are soft and easily cut with knife.

Reason why choice D is wrong: There are metals in Transition Metals that are unreactive such as Gold, Silver and Copper. Moreover, the most reactive metal is Potassium. These information are found in the reactivity series. Potassium is placed at the top of the reactivity series as they are the most reactive and Copper, Silver and Gold at the bottom as they are unreactive.

answered: maddieb1011

Letter b. They include familiar metals such as gold, silver, copper, and nickel.

Transition Metals they are found at the center of the periodic table. Note that Groups IB and IIB come after Group VIIIB in the periodic table. The elements in Group IIB are often classified as transition elements even though they do not exhibit the characteristics of these elements.

answered: Guest

Work done = force ×distancebut force = mass ×gravityand gravity = 10m\s force = 2×10 = 20 work done = 20×3 = 60 joules

answered: Guest

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

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Which of the following statements about transition metals is true? . a.. they are never found uncomb...