Answer : Group 14 elements are likely to have substances that have both metal and non-metallic properties.
Explanation :
Metalloid : It is a type of element whose properties lies in between the metals and non-metals.
There are commonly six metalloids : Boron(group 13), Silicon & Germanium(group 14), Arsenic & Antimony(group 15), Tellurium(group 16).
Properties of Metalloids :
- Metalloids look like metals but behave largely like non-metals.
- Metalloids are solid, brittle and lustrous.
- Metalloids has ability to conduct electricity.
Therefore, Group 14 elements are likely to have substances that have both metal and non-metallic properties.
Answer:
Elements only contain one type of atoms while compounds contain two or more types of atoms.
Explanation:
An example of an element is sodium --> Na (only Na atoms)
An example of a compound can be water --> H2O (contain H and O atoms)
*But the particles within a compound are all the same.
Silicon (Si) atomic mass is 28.085.
To find the mass number of most common isotope we need to round atomic mas to wholes.
28.085≈28 is atomic mass
Atomic number(number of protons) is an ordinal number of an element in the Periodic Table.
For silicons it is 14.
Mass number=number of protons(atomic number)+number of neutrons.
Number of neutrons=Mass number - Number of Protons(atomic number)
Number of neutrons= 28 - 14 = 14
Correct answer is B.14
Answer:
PART A
Explanation:
3. A cylinder of compressed gas has a pressure of 4.882 atm on one day. The next
day, the same cylinder of gas has a pressure of 4.690 atm, and its temperature is
8°C. What was the temperature on the previous day in °C? Ans: 20°C.
believe the answer is c. A and D are just mixing solutions. B is a change in state not chemicals. And E doesn't change the compounds
