what seven elements have the appearance and properties of a metal but behave like the non-metal in certain situations?

i. boron

ii. silicon

iii. germanium

iv. arsenic

v. antimony

vi. tellurium

vii. polonium

Explanation:

Elements that have appearance and properties of a metal but behave like non-metal in certain conditions are called semi-metals or metalloids. On the periodic table, they are found between metals and non-metals. Examples are astatine, polonium, tellurium, antimony, arsenic, germanium, silicon, boron.

Some of their properties that make them look like metals are:

i. They exist as solids at room temperature.

ii. They are shiny.

iii. They are ductile.

Some of their properties that make them look like non-metals are:

i. They are brittle.

ii. Not very good conductor of electricity compared to metals.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

a time line cause it goes from 685 to 978