Chemistry, 23.01.2020 08:31 Ilikepandas2019

How were metal engravings made?
a. using a brayer
b. using a burnishing tool
c. using the intaglio technique
d. none of the above

Answers: 2

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Answers

Answer from: nofer

Engraving is the practice of incising a design onto a hard, usually flat surface, by cutting grooves into it. The result may be a decorated object in itself, as when silver, gold, steel, or glass are engraved, or may provide an intaglio printing plate, of copper or another metal, for printing images on paper as prints or illustrations; these images are also called engravings.

Answer from: naomicervero

Answer from: rivermadds1514

By using the intaglio technique

Explanation:

Engraving on metals is an example of intaglio printing

Intaglio printing is a technique of printing. In this process ink is placed below the surface of the object. Placing of an ink in done by first carving the surface manually or mechanically with help of sharp tool having pointed end and then ink is applied in the grooves with the removal of excess ink from the surface.

where as brayer is a roller used to print the surface of an object and burnishing tool are used for providing super fine finishing to the surface of the objects.

Hence, the correct answer is option(c).

Answer from: kamerin46

By using the intaglio technique

Explanation:

Engraving on metals is an example of intaglio printing

where as brayer is a roller used to print the surface of an object and burnishing tool are used for providing super fine finishing to the surface of the objects.

Hence, the correct answer is option(c).

Answer from: Quest

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.